Understanding Adhd 2001 (Revised Edition)The definitive guide to Attention Deficit Hyperactivity Disorder fully revised and updated for a new generation of parents. The definitive guide to Attention Deficit Hyperactivity Disorder fully revised and updated for a new generation of parents. The bestselling author of Toddler Taming and Beyond Toddlerdom, Dr Christopher Green, with Dr Kit Chee, demystifies ADHD, the elusive and distressing condition that affects learning and behaviour.