Berrett Koehler
The best selling books on business practices.
http://www.bkconnection.com

Amazon.com
Find what ever book you are searching for here.
http://www.amazon.com

BarnesandNoble
A great place to find a great book!
http://www.BarnesandNoble.com

Scholastic
A great place for a kid to find the perfect book for them, with tons of selections.
http://www.scholastic.com