“Cognitive Therapy of Depression” by Aaron Beck et al (ISBN 0-89862-919-5)
As the title suggests, a discussion of the treatment of depression using cognitive therapy. Rather complex and is aimed primarily towards professionals, as opposed to service users.

“Freedom from Depression Workbook” by Les Carter & Frank Minirth (ISBN 0-8407-6207-0)
Very simplistic guide to depression. Includes questions to answer as part of a self-help programme