Abebooks.com
This site functions more as a directory than an actual retailer. Let's you search 13,000 booksellers at one time.

Amazon
Online retailer of both new and used books. Canadian users should use this link for Amazon. (Thanks, Brenda!)

Barnes & Noble
Online retailer of both new and used books.

Bartleby.com
Online retailer of new books.

Chapters (Thanks, Brenda!)
Another retailer for our Canadian users.

Clean Run (Thanks, Yintzy!)
Online retailer of dog books and products.

Dogwise (Thanks, Mordy!)
Publisher and online retailer of dog related books.

Half.com
Buy and sell previously owned books.

Karen Pryor (Thanks, Yintzy!)
Karen is a clicker trainer and offers books on her website.

Powell's City of Books
Online independent retailer of new and used books.

Sit Stay
Online retailer of dog products, including books.

If you have any other suggestions on where to purchase books, please feel free to post below and I will add them to this list.

Here's a couple more:
www.4mdogbooks.com
http://www.dog-play.com/books.html (lots of books on therapy dogs)

Heres a great site with CHEAP books!

http://www.bookcloseouts.com

Hey, Ash - you just cost me $40!

I just discovered this specialized comparison shopper just for books, dvd's and electronics. It makes it so easy to get the best deal. I LOVE it!!

http://www.spotcost.com

All the best,
Carol and the grrrls