Me and my little brain

Tom a.k.a. The Great Brain, has gone off to attend boarding school in Salt Lake City, leaving little brother J.D. to follow in his ingenious and conniving footsteps. Since all of J.D.'s attempts at profitable endeavor fail miserably, he soon realizes that he just doesn't have that crafty Great Brain knack. But when his young adopted brother is kidnapped by a desperate outlaw, J.D. finds that his little brain may not be so ordinary at all.

1971
Dial Books for Young Readers