I took a course that had an e-text and it too had the expiry thing, plus it would not let you copy or paste at all. So, if you wanted to cite from it in your message board posts (it was an on-line class) you had to manually type in every word. Ridiculous. Also, the search box only worked on the plain text pages. If anything you wanted to search for was part of a call-out box or other graphic, the PCR would not recognize it. It was useless.
That said, my undergraduate degree was in English literature, and if ebooks had been big then I would have saved a ton of money. The single most expensive book I bought for my degree was the Norton Shakespeare. The cost of that book alone would have paid for half a Kindle and you could have gotten all the content on-line for free. Probably half of my course reading would be available now at Project Gutenberg!
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