I read his book. Even after reading it, I'm not sure I could answer very many questions about what he believes, because there really wasn't a whole lot to it.
He is a Biblical literalist, which is where he gets his "Word of Faith" theology and his belief in "name it and claim it" prosperity. However, the book was quite lacking in scripture support.
The claim that they have 45,000 in worship each Sunday is highly exaggerated, according to friends of mine who live in Houston. The building seats 16,000, they have a Saturday night and two Sunday morning services. The Saturday night crowd is about 10,000, and the two Sunday services together may gather another 10,000 total. They may have 45,000 "members," but like most mega-churches, the membership figure is 60% greater than the actual attendance.
It might be interesting to have someone from Houston on the board describe the impact Lakewood has on smaller churches. My friends tell me that between Lakewood and Second Baptist, the smaller, evangelical congregations are almost non-existent in the western inner city area.