This book is very interesting. The concepts it outlines are entertaining and makes you think more deeply about games and strategies than you might have done before. Times when a certain 'intuitive' strategy would seem obvious are shown to actually work against you. For instance, if you were to play a game of 'Rock, Paper, Scissors' against a professional, you would quickly find a strategy of picking your next move at random to work in their favour.
However, I felt the book was marred by frequent and unnecessary references to biblical passages. The authors use quotes from the bible to reinforce their points, all of which do not need such quotes to give them credence. That in itself would be acceptable in my eyes, as clearly the Christian authors feel these quotes best illustrate their points. What makes it worse though is that early on, there is a footnote that actually challenges anyone that doesn't believe in god to make Pascal's Wager, claiming it is the 'dominant' strategy in the game of beliefs. While I feel this is a good example of how game theory can permeate all aspects of life, I don't feel it is necessary for the authors to tell me that I am wrong in my beliefs. Especially when the authors overlook a key assumption that would otherwise change the initial conditions of the game they claim to have the answer to.
I would have given this book a higher rating if they had stuck to their area of expertise rather than trying to convert me. It's a real shame, because other than these points, it was a great book.