I was talking to a medical supplies delivery guy, boasting about how good I was at finding books given a vague description (I had recently answered quite a few at the Reference Desk). He of course called my bluff, asking me to identify a book he had read about 40 or so years ago. All he could remember about it was the main character was a boy who could run faster than a deer. The boy may or may not be from another dimension, he wasn't sure.
I've searched for this book for about 3-4 years now without any luck. Any ideas?