I love the book as well! It is right on for my DS9 too. It has been so nice to be able to read and better understand my son through this book. It has also explained many things that I see and have seen in testing and everday activity from him. I first purchased on my kindle but then decided to order from amazon so I could have a hard copy and highlight the pieces I wanted to. Just read it over last couple months. I wish I would have known about it about 2 or 3 years ago but better late then never.
