Terhune penned many books about the dogs he kept and trained on the Sunnybank estate throughout the 1920s and 30s. Wolf, is Terhune's classic story of the funny-looking purebred collie who was somewhat an outsider with a matching personality. Wolf the dog himself became famous posthumously when his heroic death was recorded in nearly every paper in America. This early work by Albert Payson Terhune was originally published in 1925, we are now republishing it with a brand new introductory biography.