Is the Ipad the only device that can store college books?

Or is there anything cheaper? Or what are my options?Is the Ipad the only device that can store college books?
You do know that you can get the books in PDF format most of the time and put them on a laptop or netbook. Or if you want get them in E-pub format and use a program like Calibre ( http://calibre-ebook.com/download use the link pick the proper operating system) and use a laptop. Or buy an android based tablet and use a reader app.Is the Ipad the only device that can store college books?
Kindle. Nook. A bookshelf.

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