W. Y. Evans-Wentz, great Buddhist scholar and translator of such now familiar works as the Tibetan Book of the Dead and the Tibetan Book of the Great Liberation, spent his final years in California. There, in the shadow of Cuchama, one of the Earth's holiest mountains, he began to explore the astonishing parallels between the spiritual teaching of America's native peoples and that of the deeply mystical Hindus and Tibetans. Cuchama...