There's an interesting thread on Slashdot about the recent Amazon/Macmillan bust up. In particular, scroll down and see what user " raddan" has to say since works for Macmillan. He references a previous post which links to a page that shows you where the money goes when you buy a book. He argues that eBooks aren't cheaper to produce for the publisher (at least not yet):
http://www.uncp.edu/bookstore/pdf/textbook.pdf
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