Customised eTextbooks
A Stakeholder Perspective
Clemens Bechter and Yves-Gorat Stommel
Thammasat Business School, Thammasat University, Tha Prachan, Bangkok, Thailand
Keywords: eBooks, Electronic Textbooks, Self-publication, Customisation, Personalisation.
Abstract: In this article we present a reader’s as well as an author’s perception of customized eTextbooks.
Customisation providers such as editors, translators and graphic designers were asked about their preferred
model of compensation for their work by self-publishing eTextbook authors or publishers. Although the
royalty model was preferred by authors, most providers prefer an upfront payment. The main goal of this
paper is to assess the value that stakeholders put on customised content. A survey conducted in 2013
showed that readers are not willing to pay a substantial amount for customisation. Readers associate a high
level of risk with purchasing a self-published eTextbook. Respondents considered a fair retail price for self-
published eTextbooks should be a third lower than those distributed by publishing houses. However, current
prices charged by renowned publishing houses for a typical post-graduate level textbook chapter (i.e.,
around US$ 8-9) are higher than readers (e.g., students) consider reasonable. Convenience is the major
factor determining why people read eTextbooks and recommendations by peers and forum members rank
top in creating awareness and influencing the actual purchase. The authors recommend a system based on
collaborative filtering to provide customization options to readers.
1 INTRODUCTION
Customisation has spread to increasingly diverse
areas such as creating one’s own holiday by mixing
and matching transportation, accommodations,
restaurants and experiences, so no holiday needs to
be the same. Other examples are: t-shirts (graphical
design), M&Ms (text messages on sweets), own
blend of tea or coffee, eyeglasses, golf clubs to name
a few. One of the latest examples is the book market.
The global book market was valued in excess of
US$120 billion in 2011 (Lucintel, 2012). Digital
versions of books ‘eBooks’ are taking away market
share from printed books, while reinventing the
medium itself due to lower cost, easy distribution
and digital functionalities. Fuelled by cheap
distribution and low production cost, there is a
continuously growing market of self-published
eBooks. A sub-type of eBook is the eTextbook,
mainly read by students and compiled by tutors
(instructors). Whereas the printed hardcover
textbook of a post-graduate course can amount to
US$200 or more, the electronic version is offered, at
best, for half that price. Most leading academic
publishing houses offer customisation options.
Instead of selling a complete textbook (e.g., 800
pages, 22 chapters), they offer chapters for around
US$8.50 each. Tutors can pick the content they like
and may add third party case studies, simulations or
whatever they consider suitable. However, the more
copyrighted materials the more expensive the
customised eTextbook becomes.
Tutors are becoming more and more interested in
customising their textbooks. Large academic
publishing houses support this trend by offering
customisation sites for their textbooks and provide
instant gratification by offering instantaneous
delivery of the compiled eTextbook. Besides large
publishing houses there are intermediaries that
negotiate license fees with various content providers
on behalf of the self-publisher or buyer. Buyer could
be a professor teaching a course or a whole
university that wants to customise textbooks for their
courses.
Self-publishers often rely on third party service
providers such as graphic designers and animation
developers. The starting point can be a text, to which
other providers can add covers, layouts, edited
versions, translations, etc. The eTextbook project
initiator can decide to either own the content/design
163
Bechter C. and Stommel Y..
Customised eTextbooks - A Stakeholder Perspective.
DOI: 10.5220/0004765301630170
In Proceedings of the 6th International Conference on Computer Supported Education (CSEDU-2014), pages 163-170
ISBN: 978-989-758-022-2
Copyright
c
2014 SCITEPRESS (Science and Technology Publications, Lda.)
by paying a fixed amount to providers, or to work
with other content providers on a royalty basis
(Stommel and Bechter, 2013).
According to Goldberg (2011), self-published
books outnumber traditionally published ones by 2
to 1, with more than 210,000 titles being self-
published (based on ISBN statistics) each year. The
growth rate of eBook self-publishing is a factor of
four higher than printed book self-publishing (Rice,
2012). Self-publishing activities are estimated to
have led to traditional publishing houses missing out
on some US$100 million in revenue in 2011 (Rice,
2012). Self-publishing of eBooks is fuelled through
an increasingly large number of service providers,
with an increasingly diverse focus. The more the
market matures, the more service providers have to
specialise.
While the vanity aspect of being published
instead of self-published is still a factor for some
authors (Jia, 2012), this seems to become less of an
issue for academic authors. Hence, according to
some researchers, self-publishing will become the
norm for eTextbooks (Goldberg, 2011).
Some authors recommend that tutors give away
their self-published eTextbooks for free because
royalties earned are only of secondary consideration
for academics (Hilton and Wiley, 2010). For
example, eTextbooks are already available at the
Worldreader digital library, where African children
have free access to such educational eBooks on their
mobile phone or donated Kindles, initiated by David
Risher, a former Amazon executive (Wingfield,
2012; Fowler and Bariyo, 2012).
Besides the obvious advantages of working with
eTextbooks, self-published or not, there are
disadvantages:
Lack of universal publishing standards.
Sharing/lending books becomes difficult without
violating copyrights (Fister, 2010).
Privacy might be impacted when personal text
markings (shared on some reading platforms) are
utilised by others (Fister, 2010).
No bookshop support (Fister, 2010).
No chance of becoming a collector’s item (Jia,
2012).
Issues pertaining to Digital Rights Management
(Fister, 2010).
Loss of income to authors because of piracy
(Williams, 2012).
Usually, publishers grant licenses for a limited
period of time (e.g., three years) and demand high
sales (e.g., 200+) volumes. Especially students may
complain that a used, customised eTextbook cannot
be sold on to junior batches because of the
customised content.
While a significant share of available eTextbooks
are direct copies of print to the digital environment,
partly in order to mimic the reading experience of a
print book (layout, switching pages, etc.), some
additional functions have already been incorporated
(Alfa Bravo, 2011):
Adding/sharing/seeing other student’s notes
eTextbook recommendation by email, Facebook,
Twitter, etc.
Online rating
Text highlighting/copying
Adding bookmarks
Choice of fonts, font sizes and background
colours
Text search
Usage on multiple devices
Integration of animations, simulations and digital
stories
Integration of audio files (audiobook)
eTextbooks increasingly exploit the digital
nature and include audio and video content, as well
as hyperlinks and other interactive aspects.
Examples are learning about chemistry (Swanson,
2011) and medical education (Husain, 2011)
respectively. However, in most cases, these
additional functionalities are often not yet
compatible with eReaders, and can only be accessed
on tablet computers.
Customisation is often supported by
‘granulation’ of creative efforts (Stumberger, 2012).
A book project is split into very small components.
Long term work contracts often make way for
assignments, with individuals contributing their
expertise for a very short period of time to such
eBook projects involving a large number of
individuals (Stumberger, 2012). From the author’s
point of view, benefits can be derived from a
virtually unlimited source of providers, potentially
located world-wide, with high speed interaction
(Velamuri, 2012). On the downside, typical concerns
are intellectual property theft and the missed chance
of building competencies within the publishing
house or the self-publisher her/himself.
It is difficult to get reliable data on the market
share of self-published eBooks. Estimates for the
U.S. market range from 30% market share of self-
published eBooks to 77 % (McLaughlin, 2012). The
revenue share of self-published eBooks is generally
lower compared to the volume share, because self-
published eBooks are lower priced than published
ones.
The strong growth in eBook consumption has
been propelled by widely available eReaders (e.g.
CSEDU2014-6thInternationalConferenceonComputerSupportedEducation
164
Kindle), tablet computers and smart phones, which –
at the end of 2011 – enabled 807 million consumers
around the world to read eBooks on their devices
(Research and Markets, 2011). By 2015 this number
is expected to grow to 1.8 billion unique users
worldwide – this reach is roughly equal to the
expected reach for daily newspapers (Research and
Markets, 2011).
The most popular eBook formats are epub,
kindle and pdf. By offering an eBook in all three
formats, basically every available reader can process
a copy of an eTextbook.
2 RESEARCH OBJECTIVES AND
THEORETICAL FRAMEWORK
Since the eTextbook market is very young and
dynamic, most recent information can only be found
on the web. This leads to an overrepresentation of
online sources compared to academic journals,
which in some cases might result in
overemphasising the point of view of individuals.
For example, forum discussions are a good indicator
of the latest developments in this very young
industry, however, they often represent the
convictions of single individuals only. The purpose
of this study was to analyse the process of how
eTextbook readers find / choose their next book and
whether they had an interest in customisation and
self-published books.
Apart from readers, the criteria of authors for
selecting their self-publishing provider and the
interest in customisation by outsourcing parts of the
project were also analysed. Besides readers and
author the third target group of the research were
graphical designers, editors and translators. It has
never been analysed whether such providers are
willing to offer their services to a self-published
eTextbook on a royalty basis and if for how much.
The research questions were:
How does the eTextbook reading community
perceive self-published eBooks versus the ones
by renowned publishing houses?
Does this community have an interest in
customising their eTextbook?
What is the community willing to pay for
eTextbook customisation?
How and on what motivational basis do self-
publishing authors find and choose their self-
publishing provider?
What are the main perceived advantages and
disadvantages of self-publishing eTextbooks for
authors?
Which aspects of eTextbooks – apart from the
text – are the most crucial to the success
according to authors and readers? What would be
its monetary value?
Are providers such as freelance graphical
designers, translators and editors willing to work
for self-publishing authors for royalties on sales?
How high would those royalties need to be?
Figure 1: Research Framework.
The questionnaire addressing the value
perception of Readers included 23 questions
subdivided into 5 main categories:
1. Consumer reading habits and motivation: Time
spent reading eBooks, type of eBooks, type of
eReader and motivation for reading. From the
various available motivational theories (Kotler et
al., 2013), Maslow’s theory was chosen as it is
relatively straight-forward and lends itself better
to online questionnaires (reducing the number of
questions) compared to for example Hertzberg’s
theory (distinguishing between satisfiers and
dissatisfiers).
2. Consumer psychology: The perception of self-
published vs. published eTextbooks. Other
stimuli for reading eBooks.
3. Marketing stimuli, buying decision process and
purchase decision in regards to becoming aware
of, finding and choosing eTextbooks.
4. Interest in customising written content and
willingness to pay a premium for it.
5. Consumer characteristics: social, personal
(demographic) and cultural parameters of the
reader.
The questionnaire addressing Author issues
included 25 questions subdivided in 6 main
categories:
1. Introduction and author publishing history: the
number of eBooks and the formats published in.
CustomisedeTextbooks-AStakeholderPerspective
165
2. The publication motivation.
3. Publishing provider: How was the provider
found and chosen, what are the business model
preferences, what did the author learn from the
collaboration?
4. Opinion/usage/pricing of (self-published)
eTextbooks: analysis of author’s perception on
self-publishing and pricing.
5. Author’s interest in add-ons to the written
content and willingness to pay royalties.
6. Social, personal (demographic) and cultural
parameters.
The third group, the Providers, were asked one
question only concerning their willingness to
provide building blocks to a self-published
eTextbook without upfront payment, while
participating in revenue sharing through royalties
and stating her/his expected share of the cake.
Because the largest social networks are not
professional ones (e.g. Facebook, Myspace,
Google+), these were deliberately not used as data
source. Some of the reasons for this decision were:
Too big a network can quickly lead to
participants of lower relevant qualification and
lower quality exchanges (Postrel, 2007).
Niche social networks are often better suited to
effectively reach the target market segments
(Kotler et al., 2013).
Therefore, the author/provider questionnaires
were posted in following groups, see Table 1.
Table 1: Questionnaire postings: authors and providers.
Network Group Members Survey
Xing eBook ~400 Authors
Xing
Überse
t
~5,000 Editors/Transl.
LinkedIn
LinkEd
~49,000 Editors
LinkedIn
ProZ.c
~28,000 Translators
LinkedIn
Freelan
~4,000 Transl./Designer
Readers were approached through twelve online
eBook forums.
All in all 616 responses were received out of
which 400 were readers, the rest was made up of
authors, editors, graphic designers, and translators.
The predominant age group was 41 to 50 years of
age. 41% came from the USA, followed by UK and
Germany.
3 FINDINGS
Findings are based on surveys of readers, authors,
and providers such as translators, editors and graphic
designers.
3.1 Readers
Most readers used a Kindle (54 %), Sony eReader
(17 %), Kobo (7 %) or Apple portable device (7 %).
The primary reason/motivation for reading
eTextbooks is convenience,see Table 2.
Table 2: Motivation eTextbook purchase.
Scale: 1 (low) – 10 (high) Mean StDev
Convenience 8.8 1.62
Ease of storage 8.6 1.97
Size of library 7.8 2.18
Interactive components 3.2 2.51
Video/audio content 2.2 1.95
Adjustable font (size) 7.7 2.19
Gender differences for the parameters listed in
Table 2 were evaluated through mean differences. A
t-test indicated significant differences for
‘Convenience’, ‘Ease of storage’ and ‘Adjustable
font size’, which were significantly higher ranked by
women. When comparing the expected price
difference for published vs. self-published eBooks,
all respondents expect the same or a lower price for
the self-published eTextbook, with the median at 45
% i.e. 45% price deduction for a self-published
book, see Figure 2.
Figure 2: Price perceptions.
The main reason for the expected discount is the
perceived risk of poor quality when buying a self-
published eTextbook. To check for interdependence
between the discount and other reasons than risk for
the expected discount (e.g. lower production cost,
lower overhead, less marketing expenses), a cross
tabulation was carried out, followed by a calculation
of Lambda coefficient and Goodman and Kruskal
0
5
10
15
20
25
30
35
40
45
50
-90 -70 -50 -40 -30 -20 -10 0 +10 +20 +30 +40 +50 +70 +90 +100
Premium (+) or discount (-) for a self-publ. versus a publ. eBook [%]
Count [-]
CSEDU2014-6thInternationalConferenceonComputerSupportedEducation
166
tau in order to test the strength of the associations.
Both statistics showed no association between
expected discount and other justifications.
The next questions were: how do readers become
aware of these self-published eTextbooks and what
additional electronic features do they expect and
how much more are they willing to pay?
Table 3: Awareness sources.
Mean
Stand.
Dev.
Online ad 3.9 2.65
Information in article 5.3 2.42
Online posting by author 4.1 2.74
Recommendations from friends /
in forums
7.9 2.23
Book seller recommendations
based on prior readings
5.4 2.76
Book seller homepage
recommendations
4.3 2.61
Browsing by topic on book seller
homepage
5.5 2.81
Browsing by price on book seller
homepage
3.9 2.72
Recommendations by friends and forums were
the most important factor when becoming aware of a
new eTextbook, see Table 3, as well as actually
purchasing it, see Table 4.
Table 4: Buying criteria.
Mean Stand. Dev.
Forum/friend recommendations 8.0 2.10
Book seller recommendations 5.1 2.55
Readers' reviews 6.8 2.17
Cover 4.9 2.51
Price 6.3 2.60
Sales rank 3.6 2.60
Blurb/book summary 7.3 2.19
Reading sample 6.8 2.97
Blurb and a reading sample ranked second and
third.
Readers were given seven customisation options
which they had to rank between 1 (lowest interest)
and 5 (highest), see Table 4.
Average interest in any of the given
customisation options was low, with the choice of
book cover ranking highest. As a direct result, the
premium that the respondents are willing to pay for
customisation options is relatively low ranging from
US$0.06 to maximum US$0.13 (adding personalised
content). Respondents who were interested in a
choice of book cover, were as well interested in a
choice of graphics and choice of layout versions, see
Table 6.
Table 5: Customisable features.
Mean
Stand.
Dev.
Animations 1.5 1.51
Choice of book cover (based on
content)
2.8 2.58
Choice of graphics intermixed with
text
2.5 2.33
Choice of edited versions
(short/long)
2.3 2.13
Choice of layout versions (e.g.
gothic, fairytale, modern, …)
2.5 2.24
Adding of digital stories 2.1 2.10
Adding of personalised content 2.4 2.36
Table 6: Customisation Options Correlations.
Cover Graphics Layout Age
Cover
Pearson
Corr.
.607
**
.536
**
-.209
*
N 140 140 140 138
Graphics
Pearson
Corr.
.607
**
.483
**
.195
*
N 140 140 140 138
Layout
Pearson
Corr.
.536
**
.483
**
.194
*
N 140 140 140 138
Age
Pearson
Corr.
-.209
*
.195
*
.194
*
N 138 138 138 138
**Correlation is significant at the 0.01 level (2-tailed)
*Correlation is significant at the 0.05 level (2-tailed)
No association between customisation options
and gender was found. In order to reduce the number
of answers/variables, a factor analysis of the
questions with numerical scale was conducted. Table
7 shows that ten variables can be condensed into
four factors (also known as components or
dimensions). Factor one can explain the most (22%)
and factor 4 the least (12%) of variance.
The four factors can be described as follows:
1. The first factor has four high loading variables
(cut-off : 0.6) and can be described as valuing the
‘easy to use’ characteristics of eTextbooks.
2. The second factor has two high loading variables
and can be described as valuing the ‘interactive’
characteristics of eTextbooks.
3. The third factor has two high loading variables.
CustomisedeTextbooks-AStakeholderPerspective
167
The dimension can be described as ‘sales price’
dimension.
4. The fourth factor reflects the ‘discount’ that a
self-published eTextbook comes with.
Convenience in the broadest sense is the main
reason. Second reason reflects the additional
interactive features that eBooks offer.
Table 7: Major Factors.
Factor Loadings
1
(22%)
2
(16%)
3
(15%)
4
(12%)
Ease of storage 0.779 0 -0.10 0.014
Size of
library/modules/chapters
0.730 0.017 -0.21 0.172
Convenience 0.666 0.035 0.158 -0.2
Adjustable font 0.636 -0.06 0.148 -0.09
Reading time 0.478 -0.31 0.031 0.202
Interactive components 0.069 0.892 -0.01 0.001
Video/Audio content -0.14 0.852 0.148 0.126
Price published
eTextbook
0.057 0.009 0.896 -0.25
Price self-publ.
eTextbook
-0.03 0.17 0.806 0.464
Discount self-publ.
eTextbook
-0.01 0.069 -0.02 0.932
3.2 Authors
A total of 90 authors answered the questionnaire.
The predominant age group was 31 to 65, see Figure
3.
Figure 3: Age distribution authors.
When asked about their motivation, income
seems the main driving force to write eTextbooks,
see Table 8, but self-development in the sense of
Maslow’s motivation theory ranked a close second.
One can hypothesise that the more global
exposure of an eTextbook the more income can be
generated through royalties or revenue when self-
published. This was confirmed by our research
finding, see Table 9.
Table 8: Authors’ Motivation.
Mean Stand. Dev.
(additional) Income 7.3 2.73
Peer pressure 1.3 1.24
Self-esteem 5.1 3.28
Recognition by others 4.3 2.98
Status 3.4 2.46
Self-development 7.1 3.05
Table 9: Why author eTextbooks?.
Mean
Stand.
Dev.
eTextbooks are the future 8.0 2.23
eTextbooks are cheaper to produce 8.9 1.82
eTextbooks give global access
9.1 1.65
eTextbooks are interactive 5.2 3.30
eTextbooks come with video/audio
content
4.6 3.40
eTextbooks give a better chance of
success
8.5 2.29
When asked to assign a fair selling price to one
of their own eTextbook chapters, the average was
US$3 or 25% lower than the readers are willing to
pay. However, the authors think in terms of income
and the readers in terms of retail price (incl. VAT)
so both are not too far apart.
The preferred compensation model of working
together with service providers was on a royalty
basis (82%) versus upfront payment. When it came
to the question how authors chose their current
publisher, the distribution reach ranked highest. The
amounts they are willing to share are relatively
small, see Table 10.
Table 10: Authors’ Royalty Model.
in US$ Mean Stand. Dev.
Cover 0.25 0.22
Graphics 0.16 0.18
Editing 0.26 0.21
Layout 0.17 0.17
Translation 0.26 0.25
Digital Stories 0.21 0.32
On average translation ranked highest, a fact that
is down to non-English speaking authors. Assuming
that an eTextbook gets sold 10,000 times then
US$2,600 would go to the translator.
3.3 Providers
Nineteen graphical designers took part in the survey.
Only a third of respondents would consider
providing a cover based on a royalty model. The
0
5
10
15
20
25
30
<14 14-18 19-24 25-30 31-40 41-50 51-65 >65
Age group [years]
Count [-]
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168
ones who did, consider around US$1 as a fair share
for their contribution to an eTextbook, a far cry from
the US$0.16 per book that authors consider as
appropriate. Out of the twenty five editors who
participated only 25% consider the royalty model as
fair. The few who would settle for it consider around
US$0.70 as fair share. 56 out of 82 translators were
not willing to contribute without upfront payment
and 8 would consider this on a case by case basis.
Royalty expectations are in the region of US$1.50
per eTextbook chapter.
In conclusion, providers ask for more than
authors and readers are willing to pay. However, it
has always been difficult to evaluate the willingness
to pay. Most people underestimate their propensity
to buy. In this context a conjoint analysis may yield
more reliable results and can be scope of further
research.
4 CONCLUSIONS
The eTextbook reading community finds its next
read through recommendations of friends and in
forums. Self-published books should be priced at a
45% discount. Generally, eTextbook readers are not
willing to pay a significant amount of money for any
type of customisation. Convenience is the main
factor why people buy eTextbooks. This may
explain why customisation is not considered a major
value-added feature. The moment a reader has to
think about customisation, the convenience suffers.
A compensation model based on royalties will work
for authors but not for service providers.
5 IMPLICATIONS
Focusing on instructors, publishers have to take the
initiative and offer customisation services.
Otherwise they risk that tutors/instructors offer their
textbooks in form of self-publishing and may even
give it away for free. The eTextbook customisation
itself can be done in-house or outsourced through a
straight buy or on royalty basis. Tough negotiations
between self-publishing authors on one side and
graphic designers, translators, editors on the other
side can be expected.
Asian students may want digital stories dealing
within an Asian context whereas Europeans may go
for their cultural setting. In a more formal approach
this can be done in two ways. The first technique is
content based filtering (Pazzani, 1999). This filtering
technique could, for example, suggest book covers,
layout formats etc. to readers based on a set of
eBooks in which readers have expressed interest or
bought in the past. Collaborative filtering (Konstan,
1997), the second method, is making automatic
predictions (filtering) about interests/preferences of
a reader by collecting information from many other
neighbouring readers.
Collaborative Filtering systems usually take two
steps: Firstly, look for readers who share the same
patterns with the user. Secondly, use the ratings
from those like-minded neighbours found in step 1
to calculate a customisation prediction for a specific
eTextbook reader/customisation and his/her
willingness to pay a certain amount for it.

n
u=1
(r
u,i,k
u
) * w
a,u
P
a,i,k
=
a +
_________________

n
u=1
w
a,u
P
a,i,k
: prediction for reader a for customisation
feature i under a given price k
n : number of neighbours u
w
a,u
: similarity weight between reader a and u
r
u,i,k
: rating neighbour u for customisation
feature i under a given price k
a
: average rating reader a
u
: average rating reader/neighbour u
The likelihood that a reader is willing to pay for
a certain customisation feature (e.g. a personalised
digital story) can be calculated according to above
formula. It depends on the reader’s general
disposition i.e. some readers want to have any
possible customisation, others are more cautious.
The prediction whether reader a likes customisation i
is based on his/her neighbours. The similarity index
w
a,u
is a simple correlation.
In the era of digitalisation, customisation can
easily be done as demonstrated. Surprisingly, no
publisher has seriously pushed it yet. Offering book
chapters and case studies as modules lacks the
potential that custom eTextbooks offer, even more
so when they come at a deterring price.
Another media industry that went through a
similar experience is the music industry. Nowadays,
most money is made by selling merchandise and
concert tickets and not by music recordings itself.
Some artists even post their songs for free on sites
CustomisedeTextbooks-AStakeholderPerspective
169
like Youtube and make money through advertising.
A real game changer could be the eTextbook
because it engages students and tutors. Although
lacking the traditional administrative backend of a
LMS, an eTextbook can offer a wider variety of
interactive features and choice of devices. Publishers
have been offering eTextbooks in the form of course
content integration but not as LMS in its own right.
Especially in the context of blended learning, where
a physical infrastructure and administration system
already exists, the drawback of a missing backend
can easily be overcome. Both, LMS providers and
publishing houses commit to ‘doing the things right’
by adding more and more technical features to the
LMS and publishing more and more textbooks in
prevailing eBook formats. The real mantra, however,
should be ‘doing the right things’ by delighting
customers – the students. Students love their mobile
phones that enable them to access all sorts of
information, from friends to lectures. This is a major
advantage of m-learning. Since publishing houses,
universities and LMS providers are not necessarily
known for delighting customers or embracing
disruptive innovations, it may be self-publishing
eTextbook authors who will the first to provide
engaging m-learning (Bechter and Stommel, 2014).
REFERENCES
Alfa Bravo, (2011). Where is the e in ebooks?,
alfabravo.com/2011/08/where-is-the-e-in-ebooks/,
accessed February 18, 2012.
Bechter, C., Stommel, Y. G. (2014), eTextbook – the real
student-centered LMS, China Education Review A &
B, 3(4), pp. 17-27.
Fister, B., (2010). Ebooks and the Retailization of
Research, Library Journal, August, pp. 24-25.
Fowler, G. A., N. Bariyo. (2012). An eReader Revolution
for Africa? The Wall Street Journal, http://
online.wsj.com/article/SB10001424052702303768104
577462683090312766.html, accessed 2. August 2013.
Goldberg, T. J., (2011). 200 Million Americans Want to
Publish Books, But Can They?,
publishingperspectives.com/2011/05/200-million-
americans-want-to-publish-books/, accessed August
21, 2013.
Hilton, J., D. Wiley. (2010). A Sustainable Future for
Open Textbooks? The Flat World Knowledge Story.
First Monday, 15(8).
Hilton, J., D. Wiley. (2011). Free e-Books and Print Sales.
The Journal of Electronic Publishing, 14(1).
Husain, I., (2011). Interactive iPad Medical Textbooks
gain traction, www.imedicalapps.com /2011/03/ipad-
medical-textbooks-e-books-mobile-medical-text/,
accessed February 21, 2012.
Jia M., (2012). Paper vs Pixels, China Daily, March 18,
pp.1-3.
Konstan, J. A., B. N. Miller, D. Maltz, J. L. Herlocker, L.
R. Gordon and J. Riedl. (1997). GroupLens: applying
collaborative filtering to Usenet news. Communication
ACM 40(3), pp. 77-87.
Kotler, P., K. Keller, M. Brady, M. Goodman, and T.
Hansen, (2013). Marketing Management, European
Perspective, Pearson Education Limited, Essex.
Lucintel, A. (2012). Global book industry 2012-2017:
www.lucintel.com/reports/media_entertainment/global
book_industry_2012_2017_trends_foreacast_june_20
12.aspx, accessed March 4, 2013.
McLaughlin, K., (2012). kevinomclaughlin.com/2012/02/
26/survey-of-a-genre-science-fiction-ebook-market-
under-the-microscope/, accessed March 5, 2013.
Pazzani, M. J. (1999). A Framework for Collaborative,
Content-Based and Demographic Filtering, Artificial
Intelligence Review. 13(1), pp. 393-408.
Postrel, V. (2007). A small circle of friends, Forbes, 179
(10), p. 11.
Research and Markets, (2011). eBook Publishing &
eReading Devices: 2011 to 2015, www.
researchandmarkets.com/research/59cb8b/ebook_publi
shing, posted October, accessed January 7, 2013.
Rice, A., (2012). The 99¢ Bestseller, Time Magazine,
December 10, pp. 38-43.
Stommel, Y. G., C. Bechter, C., (2013). Challenges,
Chances and Risk Sharing When Self-Publishing
Ebooks – Research into Author Preferences,
International SAMANM Journal of Marketing and
Management, 1(2).
Stumberger, R., (2012). Die zersplitterte Arbeitskraft, VDI
Nachrichten, Nr. 44, November 2, p.19.
Swanson, G., (2011). Bobo Explores Light: Interactive
Learning E-Book, appsineducation.blogspot.com
/2011/09/bobo-explores-light-interactive.html,
accessed February 21, 2012.
Velamuri, J., (2012). Open innovation. Leipzig Graduate
School of Management working paper.
Wingfield, N., (2012). E-Books initiative enlists
publishers to help Africa, International Herald
Tribune, September 8-9, p.18.
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