info_ebooks
http://www.librarything.com/ cathalog 200 books online or use this one (in beta) http://www.listal.com/ http://answers.google.com/answers/main?cmd=threadview&id=189815 copyright free material

books

https://netfiles.uiuc.edu/ehowes/www/main-nf.htm too much information
http://www.generation.net/~hleboeuf/homhenri.htm more info to download
http--web.textfiles.com
http://www.oreilly.com/openbook/
http://labmice.techtarget.com/networking/default.htm linkguide to guides and books about networking
ftp.cerias.purdue.edu/pub/doc/ older general books and papers
http://www.books.mcgraw-hill.com/betabooks/
Internet Classics Archive to download
http://www.chuckiii.com/ ChuckIII.com - free essays, term papers, book reports, and cliff notes, 30,000+
http://whitepapers.informationweek.com/ Whitepapers from thousands of IT Vendors
http://www.itresources.ie/ Welcome to IT Resources
http://www.bitpipe.com/ Technology White Papers
http://www.ik-cs.com/library.htm good index of libraries and links and stuff to read

online book searches
The bar-code on a book is a thirteen-digit number, starting with "978". (Apparently, the first three digits of a UPC indicate the country of origin. "978" is officially Bookland. Cool, eh? The UPC number for a book is sometimes called the "Bookland EAN" A conversion must be found. Fortunately, it's trivial. The http://isbn.nu/ search form actually does it in JavaScript: