http://www.storylineonline.net/

http://www.readcentral.com/read-online-books

http://read.gov/ – The Center
for the Book in the Library of Congress invites people of all ages to discover
the fascinating people, places and events that await you whenever you read.

http://www.questia.com/
– free trial

http://en.childrenslibrary.org/

http://websearch.about.com/od/dailywebsearchtips/qt/dnt0607.htm

http://manybooks.net/

http://www.readprint.com/

http://wegivebooks.org

http://www.hachettebookgroup.com/books_open-book.aspx

http://www.archive.org/

http://onlinebooks.library.upenn.edu/lists.html

http://www.gutenberg.org/wiki/Main_Page

http://www.ipl.org/IPLBrowse/GetSubject?vid=13&cid=1&tid=7011&parent=7006

http://www.authorama.com/

http://www.classicreader.com/

http://www.bored.com/ebooks/

http://www.online-literature.com/author_index.php

http://librivox.org/

http://www.bartleby.com/

http://www.classicbookshelf.com/

http://chestofbooks.com/

http://www.readbookonline.net/

http://publicliterature.org/

http://www.dailylit.com/

http://www.fiction.us/