The Phantom Roan
Stephen Holt
Paperback
(Scholastic Book Services, March 15, 1974)
"The outlaw! The roan waved his foot back and forth in ceaseless pain. I thought so, muttered Glenn. It's a rock in the frog. He pulled a pocketknife from his levis. Sterlizing the blade in the fire, he probed for the rock. It came free a three cornered jagged piece of granite. And so begins a partnership of boy and horse that climaxes in the Rodeo in New York's Madison Square Garden" This is from the back cover of the book.