Lack necessary information need for the exam. Very redundant. okay for beginners, but don't waste your time reading more than the first three chapters. Do not use this as primary preparation for the exam. I passed with a 554, but thats all thanks to the transcender corp. Bottom line: exchange is huge and this book leaves out important CHAPTERS of information. Any book that claims to prepare for an exam should have some sort of discussion all topics that you will tested on, whether it be detailed or brief. This book did not do that. I've used IDG publications to study for other tests and liked them but they really disappointed me with this one.