Who is Gar Sawtelle from The Story of Edgar Sawtelle: A Novel and what is their importance?

Gar Sawtelle is the owner of the Sawtelle family farm and the head of the Sawtelle family. He is patient, kind, and caring as a husband, father, and dog trainer. He helps to care for and train the dogs that his family raises, as well as placing them with owners. Gar is married to Trudy, and his son is Edgar.