Martin Gardner recently died. His writing is very uneven, but he has some gems. His best book-length work is his novel of ideas, The Flight of Peter Fromm (very under-appreciated); but his strength was in smaller works, where an occasionally Chestertonian wit sparks through. He will be missed; he was that rare creature, the genuinely excellent popularizer.
I can't say I was very influenced by him, but, as I said, I liked The Flight of Peter Fromm, and Gardner happens to be where I first read about Raymond Lull.