This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available over the Internet. http://www.freetechbooks.com/
THE ONLINE BOOKS PAGE
The Online Books Page is a Listing over 30,000 free books on the Web. http://digital.library.upenn.edu/books/
At Bookboon.com you can download free books for students and travelers in PDF format. All the books can be downloaded without registration. Our ebooks are legal and written exclusively for Bookboon. They are financed by a few in-book ads. There are two categories – travel and Student. http://bookboon.com/in
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