Martha Ramirez-Oropeza is a mural painter, a performer in popular theatre, and a researcher/lecturer of the Nahuatl pre-Hispanic codices of Mexico. She was vice-director of the Mascarones Theatre Group for 32 years, and designed and co-founded the Nahuatl University pyramid campus in Ocotepec, Morelos, Mexico. She apprenticed under master muralist David A. Siqueiros, Guillermo Monroy in the Fine Arts Institute, and, more recently, under Chicana muralist Judith F. Baca. She conducts international Nahuatl Culture seminars in Mexico and lectures at the University of California, Los Angeles. She is also an artist in residence at the Social and Public Art Resource Center (SPARC) in Venice, California, and is a performing and visual arts teacher for children in a Spanish total immersion school in Santa Monica, California.

William Douglas Horden has researched indigenous divinatory systems of ancient China and Mexico with passion and independence since 1969. He is steeped in the shamanic world view from living in the Copper Canyon of Mexico with the Tarahumara Indians and in numerous other indigenous communities over the past few decades. William was initially trained in the I Ching by Master Khigh Alx Dhiegh and has since developed a fresh new approach to the ancient art. He currently lives in Roseburg, Oregon and Coatepec, Mexico.