If you are looking for a temporary book, check the library.
Listed are just some sites I use to buy books:
amazon.com
www.barnesandnoble.com
betterworld.com
bookfinder.com
www.half.com

Download the guide for each of the reading assignments. You may print it off and fill in or you can type your answers in the document. You must have these and the reading completed on the first day of school.

A Separate Peace by John Knowles

Saul Bellow - The Adventures of Augie March
Hugh Henry Brackenridge - Modern Chivalry: Containing the Adventures of Captain John Farrago and Teague O’Reagan, His Servant
Daniel Defoe - Moll Flanders
Ralph Ellison - Invisible Man
Thomas Nashe - The Unfortunate Traveler