There are many books and resources with information on ADD, such as:

Driven to Distraction: Recognizing and Coping with Attention Deficit Disorder from Childhood Through Adulthood by Edward M. Hallowell and John J. Ratey

Answers to Distraction by Edward M. Hallowell and John J. Ratey

How to Reach and Teach ADD/ADHD Children: Practical Techniques, Strategies, and Interventions for Helping Children with Attention Problems and Hyperactivity by Sandra F. Rief

Learning to Slow Down and Pay Attention: A Book for Kids About ADD by Kathleen G. Nadeau, et al.