I agree no need for more books. I primarily use the uniffical guide if i even still need a book. I like birnbaums for the coupons. Usually pay for the book using ine or two of said coupons.
I understand the planning. But as some have said there are a lot of good nooks about disney that give history and more info about the parks.
This is a bit dated but here was a list i had started some time back