Kneeknock RisePaperback, 4 September 2007

From the moment young Egan arrives in Instep for the annual fair, he is entranced by the fable surrounding the misty peak of Kneeknock Rise: On stormy nights when the rain drives harsh and cold, an undiscovered creature raises its voice and moans. Nobody knows what it is--nobody has ever dared to try to find out and come back again. Before long, Egan is climbing the Rise to find an answer to the mystery.
Kneeknock Rise is a 1971 Newbery Honor Book.