Off Season is a horror novel written by Jack Ketchum, was partially based upon the legend of Sawney Bean, which also inspired, Wes Craven's 1977 American exploitation-horror film?
Off Season (novel):  It was Ketchum's first novel and was partially based upon the legend of Sawney Bean, which also inspired Wes Craven's 1977 cult classic horror film "The Hills Have Eyes". The Hills Have Eyes (1977 film): The Hills Have Eyes is a 1977 American exploitation-horror film written, directed, and edited by Wes Craven and starring Susan Lanier, Michael Berryman and Dee Wallace.
The Hills Have Eyes