Zimmer lives outside Cimarron, New Mexico where he writes about western art and ranch life. He is also the author of "For Good or Bad, People of the Cimarron Country;" "Western Animal Heroes, An Anthology of Stories by Ernest Thompson Seton," and "Cowboy Days: Stories of the New Mexico Range," all published by Sunstone Press. With his wife, Shari, and sons, Parker and Marshall, he raises and trains registered ranch Quarter Horses.