Shopping Sites

General shopping portals that include books

• Amazon
• Yahoo
• Acorn

Book Publishers

• Springer-Link and source code
• Cambridge University Press
• DK Publishing
• Dummies Books
• Government Printing Office
• O'Reilly and Associates
• Oxford
• Wiley

Physical Book Stores

• Bookshop Santa Cruz
• Stanford Book Store
• Kepler's

On-line Book Sellers

• isbn.nu
• AllBookstores
• BookFinder
• Books Price
• AddAll
• DirectTextbook
• Barnes & Noble