Well, what do you want from your book?
Birnbaum is the official guide and will give you basics and hype you up.
PassPorter is a planning guide with lots of good info. And when I say planning, I mean literally. Tracking and how-to.
The Unofficial Guide to Walt Disney World is an information guide. It will tell you everything you need to know in an objective manner--the good, the bad and the ugly. It presents opposing viewpoints in many (most, all) cases. It also tells you how to do everything you need to do and how to make decisions that are best for you.
I recommend to anyone new or relatively inexperienced, The Unofficial Guide. The PassPorter is a good companion.