I would undoubtedly buy a device as has been described here. I am not in school at the moment, but have taken several courses at Northern IL U recently---last semester, one of my texts was available as a time-limited (six months) pdf at around half the cost of the print version.
The biggest attraction for me of a big screen is readability; I have somewhat limited vision.
Textbooks are a subject all of their own in any case---publishers rape the market. I have seen some profs deliberatle specify just one edition out of date, in which case you can buy the text online for $10-25 instead of $100.
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