Amazon.com
http://www.amazon.com
This excellent online book store offers some great savings!

Jason Aronson, Inc
http://www.aronson.com
This site offers discounts on over 1,000 titles of works in psychotherapy, alcoholism, drug abuse, cognitive therapy, and child therapy, plus the choice of one free book for each one offered.

Dual Diagnosis Online Dictionary of Mental Health
http://www.human-nature.com/odmh/dual.html
Sciacca hosts this Web site for co-occurring mental illness and substance disorders. Complete articles and chapters may be read and downloaded. It also contains a search engine and mailing lists.