it is very easy with any ebook reader to move the ebooks from your reader to your computer and back again. the 6 astak ez reader and 5 ez reader pocket pro both support DRM'ed pdfs, so they should work with library books, but check your library to see what formats they offer. both ez readers also read epub, mobi, txt and other formats. both astak units are under $300 and they have a rep - RobertB