LOL! I haven't read any of his books or stories.
Neither have I but, from what I understand, he is a well read SciFi writer. My SciFi years ended year ago and were replaced with saintly diaries.
I particularly enjoyed the part where he asked God to reveal Himself and suffered a heart attack 2 days later. Reminds me of that saying: "Be carefule what you ask for, you might just get it". God does indeed have a sense of humor.