*A world-renowned expect provides everything clinicians need, from tools for assessment and diagnosis to treatment and management strategies that work. *Unique--the practical clinical guidance is informed by Barkley's comprehensive theory of ADHD as a disorder of executive functioning and self-regulation. *Filled with pearls of wisdom gleaned from over 45 years of research and clinical work. *Practical features include 46 reproducible/downloadable clinician forms and parent handouts.