Care to recommend a book?

I met a gentleman tonight, a friend of my mom's boyfriend. He is a lawyer, loves learning and his next hobby is going to be to learn about spirituality and religion. According to his testimony, he believes in God and Christ...he tells people his religion is morality. He is astounded by the immensity, complexity and creativity of creation. For him, man's ability to think and question and ponder is argument enough for a higher power. He admittedly doesn't know much in this area. He is very turned off by people who think they are right, have a monopoly on the truth. He asked for any leads on books that might be helpful. I suggested Mere Christianity, a biography on Luther (legal mind), and a book by John Dickson "If I were God, I'd make myself clearer". Could you recommend any other books?

Your prayers would be valuable as well.

Thanks!