Control switch 6 March, received the next day. Nothing to say the book is very complete I found the same courses given to school on this book with beautiful well detailed color diagram chapters are well presented and EVERY separate color-coded materials. There are small exercises after EVERY chapitres.Je recommend this book! I am very satisfied. One small thing that could hamper is that it really is a book that could be used for teachers Ducou very large and very detailed so for one that seeks instead a book or they put that much this will not be this one.