Graham Oppy is a giant intellectual he has brought light to the philosophy of religion. He is an atheist and is considered the best of the best. I like to read atheistic literature but some of the books, I have read don't have enough substance. They either are clueless in scripture, or the deeply misunderstand the relationship between faith and reason. I have briefly read through the four horsemen; Christopher Hitchens, Richard Dawkins, Daniel C. Dennet, and Sam Harris. Christopher Hitchens for personal reasons is my favorite of the four; Richard Dawkins argues like a sophomore in college, and I don't personally take his arguments seriously. If you want to know the best argument against the existence of God, read this book. The book is hard, and you must digest chapter by chapter. It's worth your time, the time invested will not go to waste. This work reminds of J. L. Mackie's, "Miracles Of Theism." He goes through the classical arguments of God. The ontological, the cosmological, the teleological argument, and other arguments. The philsophy of Religion is greatly indebted to his works and his rigorous history of the philosophy of religion. This man treats the arguments of Christians seriously and doesn't presuppose atheism in his premises a reasoning skill Christians should learn.