I not only bought the book, but I use it as a text book for the AS/400 Operations Classes that I teach. Material is placed in the correct order and explained in simple terms that are easy to follow. The authors also provide access to Powerpoint Presentations for each chapter - these are also wonderful. For the new user this is the best book to buy - or if you are studying for the IBM professional operator exam - this book also contains the right information to accomplish that goal.