Full Text Books

Alex Catalogue of Electronic Texts http://infomotions.com/alex/ Contains over 14,000 public domain documents from American and English literature and Western philosophy.
Bartleby.com http://www.bartleby.com/ Preeminent publisher on the Internet of free texts, includes resources in fiction, non-fiction, verse, and reference.
Bartleby Reference www.bartleby.com/reference/ Links to online encyclopedias, dictionaries, gazetteers, thesauri, style guides, books of quotations, religion and mythology, literary history and literature, anatomy, cooking, etiquette, parliamentary procedures.
Digital Book Index http://www.digitalbookindex.org/about.htm Over 140,000 titles online, most available for free, some titles available for a small fee.
Google Book Search http://books.google.com Many online titles available for purchase.
The Online Books Page http://onlinebooks.library.upenn.edu/ From the University of Pennsylvania, lists over 30,000 free online books.

Project Gutenberg http://promo.net/pg/ Includes over 6,000 online titles available for free.
World EBook Library http://netlibrary.net/WorldHome.html The largest digital archive of eBooks and eDocuments, includes over 500,000 titles available for a small membership fee.