3 links
Blackwell Publishing
bookshop.blackwell.com
Including most book categories. Site includes catalogs, recommendations and special offers.
BookSense.com
booksense.com
Large group of independent bookstores. Store locator, book search, gift certificates, association bestsellers, organization's history and staff.
The Book Locker
booklocker.com
Offering a wide variety of titles including business, children, art, and travel. Offering digital and paper copies.