One good way to find leads on new books is to go to Amazon.com and checking out the "Customers who bought this book also bought" section of the book listings.

For "Feeling Good", the CWBTBAB section lists:
<ul type="square"> [*]Mind Over Mood: Change How You Feel by Changing the Way You Think by Dennis Greenberger[*]Undoing Depression: What Therapy Doesn't Teach You and Medication Can't Give You by Richard O'Connor[*]A Guide to Rational Living by Albert Ellis[*]The Self-Esteem Workbook by Glenn R. Schiraldi[*]Self-Esteem: A Proven Program of Cognitive Techniques for Assessing, Improving, and Maintaining Your Self-Esteem by Matthew McKay[/list]