By the author of the bestselling parent book 1-2-3 Magic. For the estimated 20 million Americans with Attention Deficit Hyperactivity Disorder comes the third edition of All About ADHD by Dr. Thomas W. Phelan, an internationally renowned expert and lecturer on child discipline and ADHD. Completely updated with the latest research and treatment information All About ADHD is a comprehensive guide to ADHD's symptoms, diagnosis, and treatment in children and adults.