William Douglas Horden is co-author of The Toltec I Ching: 64 Keys to Inspired Action in the New World, which integrates the wisdom teachings of the indigenous peoples of ancient China and Mesoamerica. He's also the author of In The Oneness of Time: the Education of A Diviner. William has studied the I Ching for fifty years. Horden’s teachers include I Ching Master Khigh Alx Dhiegh and a traditional shaman of the Tarahumara tribe of the Copper Canyon of Mexico.