BookFinder.com - Book shopping search engine for eleven sellers of new books, plus a meta search of 12 directories of used, rare, and out of print booksellers.
BookHQ - Provides free book listings, and searches new and used book prices from ten bookstores.
Booksen.com - Searches and compares prices for books.
CampusBooks - Compares prices and availability amongst eight book sites for new and used textbooks.
Campusi - Book pricing search engine - reviews over 40 online stores for new and used books, and locates coupons, if available.
CompareShopBooks - Compares book prices from about eight booksellers.
Direct Textbook - Searches five stores for new and used college textbooks.
Fetch Book - Compares new and used book prices among ten book stores.
Get Cheap Books - Searches and compares book prices at eight online bookstores. Includes used and out of print books.
ISBN.nu - Compare prices at several online bookstores with ISBN, or search by author or keyword.
MyCheapBook.com - Searches seven online book sellers for the price; search by title, author or ISBN.
NovelHovel - Compares book prices from 12 new book stores, seven for used books.
Our Web Mall - Compares prices of books at online stores.
PriceFarmer - A guide to the book prices among four booksellers.
Priceviewer.com - Searches books and compares prices among 47 book stores worldwide.
Search Biblio - Online book search and comparison ; reviews many sites.
Textbook Prices - Comparisons of six stores including shipping costs and taxes.
TextbookLand.com - Compares textbook prices at fifteen online stores.