The following websites offer reliable information about a variety of psychological conditions and treatments:

National Institute of Mental Health

International OCD Foundation

Anxiety and Depression Association of America

Association for Behavioral and Cognitive Therapies

The following books are just a handful that I recommend:

ANXIETY AND PANIC

The Worry Cure:  Seven Steps to Stop Worry from Stopping You, by Robert L. Leahy (2005)

Don’t Panic:  Taking Control of Anxiety Attacks, by R. Reid Wilson (1996)

Mastery of Your Anxiety and Panic, by David H. Barlow and Michelle G. Craske (2007)

The Happiness Trap:  How to Stop Struggling and Start Living, by Russ Harris (2008)

The Mindful Way Through Anxiety: Break Free from Chronic Worry and Reclaim Your Life, by Susan M. Orsillo and Lizabeth Roemer (2011)

OBSESSIVE-COMPULSIVE DISORDER

Getting Over OCD:  A 10-Step Workbook for Taking Back Your Life, by Jonathan S. Abramowitz (2009)

Freedom from Obsessive-Compulsive Disorder:  A Personalized Recovery Program for Living with Uncertainty, by Jonathan Grayson (2003)

DEPRESSION

The Mindful Way through Depression:  Freeing Yourself from Chronic Unhappiness, by Mark Williams, John Teasdale, Zindel Segal, and Jon Kabat-Zinn (2007)

Beat the Blues Before They Beat You:  How to Overcome Depression, by Robert L. Leahy (2010)

ADHD

Mastering Your Adult ADHD:  A Cognitive-Behavioral Treatment Program, by Steven A. Safren, Susan Sprich, Carol A. Perlman, and Michael W. Otto (2005)

Driven to Distraction:  Recognizing and Coping with Attention Deficit Disorder from Childhood through Adulthood, by Edward M. Hallowell and John J. Ratey (1994)

BODY DYSMORPHIC DISORDER

The Broken Mirror, by Katharine A. Phillips (2005)

Feeling Good about the Way You Look:  A Program for Overcoming Body Image Problems, by Sabine Wilhelm (2006)

EATING DISORDERS AND WEIGHT MANAGEMENT

Overcoming Binge Eating, by Christopher Fairburn (1995)

Eating Mindfully:  How to End Mindless Eating and Enjoy a Balanced Relationship with Food, by Susan Albers (2003)

The Intuitive Eating Workbook, by Evelyn Tribole and Elyse Reach(2017)

COGNITIVE BEHAVIORAL THERAPY

The Feeling Good Handbook, by David D. Burns (1999)