Textbooks are fucking expensive, and if your professor doesnāt require a physical copy (most donāt - they just want you to have the book at hand. Or maybe even not. Some professors literally give no fucks about whether you have the book or not) and you donāt mind having your copy as an electronic copy - this is the post for you!
Most textbook companies put out new editions every year or so even though there isnāt really that much new information. Sometimes theyāll eliminate questions if itās something like a math or chemistry book or theyāll add in a few sentences about updated legislation (the professor I work for teaches human sexuality, and the newest edition of the book she uses included the 2009 decision to allow same-sex couples have hospital visitation rights). These new editions are pointless and only created to make the textbook company money and to cut down on students selling to each other. Youāre going to ignore that. We love older editions. Make sure when youāre searching on the following sites that you donāt include the edition number to give you more search results. If one with your edition comes up - great! If not, you can usually stick to something one to three editions behind without any major changes.
Sites you should be searching:
FilesTube - FilesTube searches THE ENTIRE INTERNET for files uploaded to file-sharing websites such as MegaUpload, Mediafire, or WuUpload. Sometimes people will upload pdf files of your textbook. This is always an important first search.
Google Books - You usually wonāt find your textbook on Google Books, but itās always worth a look. Sometimes pages are missing because itās only a preview of the book, but again - always worth a look.
Scribd - People upload documents to Scribd and by becoming a member (free!) or connecting through Facebook (if youāre lazy!), you can download whatever files you may find. This sometimes includes textbooks.
BookBoon - website specifically for finding pdf versions of textbooks
Curriki - free open source materials
Flat World Knowledge - free business, humanities, and science textbooks
California Learning Resource Network
Community College Consortium for Open Educational Resources
TorrentScan - textbooks are also uploaded to torrent sites in some cases - you may as well check.
If push comes to shove, you can try variations of googling ātextbook name torrentā or ātextbook name downloadā or ātextbook name download free.ā Sometimes things pop up and I never would have known about them.
LibraryPirate is a torrent search site specifically for textbooks. (Added 10 October 2011)
AMAZING Reddit post (Added 2 November 2011)
JenkThat - I havenāt tried this out yet, but Iāve heard good things from others. Itās also a good place to find other ebooks that arenāt textbooks. (Added 29 December 2011)
Iāve found all 8 of my textbooks for this term (19 credit hours, six classes) through one of the methods above. Iām not even going to look at retail prices, but checking BigWords.com (which, if you want to buy your books/canāt find them anywhere with one of the previous methods, will give you the cheapest price on the internet), I saved $497.87 by doing this. It takes time, but itās definitely worth almost $500 worth of time. If you know of more ways to find free textbooks - please let me know!