I usually buy my books from Borders, but they didn't have it in stock yet. So . . . I bought it last Wednesday (8/22) from Barnes and Nobles.
I'll second the recommendation for the Complete Guide to Walt Disney World. I have been buying, reading, borrowing and reviewing Disney guidebooks for years. While I will always love my UG, the Complete Guide is incredible. The pictures are beautiful and rich in color and I have learned so many details and secrets about the parks. And I thought I was very knowledgeable.