I love the Unofficial Guide. It’s very thorough.I love both books, but the Unofficial Guide is much more comprehensive. Birbaum's is good for something easy to take with on the trip and get at a glance.
Actually, the DIS Boards sister site wdwinfo.com is the best.Which book is better Birnbaum or Bob Sehlinger? Or there a better book?
The Unofficial guide is the one to get if you're only getting one. The Birnbaum book is essentially a Disney press release with some nice photos.