"Since The World Began" by Jeff Kurtti is a great book which was released around 1996 or 97. It's an easy read with great info and pictures. It provides some especially good reading about the setting up of the Reedy Creek Improvement District, and many of the backstage facilities and operations at WDW that you would never associate with a resort. The Imagineering book provides tons of great pix and info- I recommend it. I haven't picked up John Hench's book yet but I hear it's very good. I also recommend David Koenig's books "Mouse Tales", "More Mouse Tales", and "Mouse Under Glass". Also if you're unfamiliar with it, I highly suggest Jim Hill's website jimhillmedia.com for some great dirt on what goes on behind the scenes at the Disney company that isn't readily available on many of the other websites....Hope I helped
Todd