I love CS Lewis, and this may not count, but Bart Ehrman is really an amazing author.
Bart and I went to the same undergraduate school...Moody Bible Institute. He has come to vastly different conclusions than I have about the basic doctrines of Christianity, but I still admire his reasoning and appreciate the civility with which he pursues discourse.
I suspect he experienced a great deal of the hypocrisy and sham-Christianity at Moody that I experienced. But Bart chose to throw the baby out with the proverbial bathwater.