I've read the sample chapters of this book (you can find them by clicking on the link to the right of the page), and they're pretty interesting, but I don't find this page itself very helpful. At best it's a scant introduction to ADHD. At worst, however, it promotes some wholly unproven ideas about the causes of the disorder. I'm not saying these ideas aren't right, but they're contrary to most of the other research I've read.

This book would be a good addition to the reading here as it presents a somewhat alternative viewpoint, but it may be a little out of date.