This book is all encompassing. It is a terrific reference tool, and covers just about everything in regards to ADD. Dr. Brown not only describes the symptoms, but how they can manifest themselves in different ways in different people. Something that I never considered to be ADD, with my son, for instance, ended up being a symptom in how he behaved. It is an excellent tool to helping deal with ADD and ADHD in adults and children, and I highly recommend it.