"Dear Mr. Bart King, you are my favorite author ... Please write back and tell me why!"
This is a tough one! Here are four possible answers:
1.) "Because I rule!" (Nah, too egocentric.)
2.) Nice try, kid, but I can spot a paradoxical riddle that demonstrates the inadequacy of logical reasoning when I see one. (This might come across as dismissive.)
3.) Since he lobbed me a Zen koan, maybe the proper response is a haiku: “The sound of a book/dropping to the forest floor/Favored author smiles.” (Hmmm… not bad!)
Of course, I could just tell HIM to go first. (Or send the reader a free book for making me think so hard!)