Ok, I've finished the book. I still don't know what to make of it as far as the participation of Flew (or lack of participation) in writing the book. I do know that generally the book was fairly sensible, but that the first appendix, written by Roy Abraham Varghese, had some examples in it that I thought were plain silly*. The bulk of the book seemed to be built around a review of theist literature from the past few decades on the arguments for the existence and attributes of God by Swinburne, etc. At the very least I did pick out a few books that sounded like they'd be interesting reading, such as Time and Eternity by Brian Leftow.
* For example, Varghese asked if a marble table, after a million years, could ever become self-aware. No? Then that demonstrates to his satisfaction that matter can't become self-aware without divine intervention. This argument reminded me of young earth creationists who ask questions like "Could two monkeys ever produce a human?"