I confess to not being a fan of books that lead you through a scenario based on a ficticious network design and this book does just that. If you like that sort of thing, this book is for you.The parts that do not conform to that model give some good information on deployment, troublehsooting and administration but is light on the details, especially in the client area. It is an easy read and will give you the basics.Better to purchase "Microsoft Exchange Server 5.5, Planning, Design and Impementation by Tony Redmond. Study hard, pass the exam, then by Tony's book. Makes you feel like an Exchange Server Champ!