This classic work surveys the indigenous pre-Christian and pre-Muslim religions of Central Asia
Julian Baldick was Reader in the Study of Religions at King's College, London. He is the author of Mystical Islam: An Introduction to Sufism, among other titles.
"A wide-ranging, comparative study which draws on archaeological, literary, and ethnographic sources from the first millennium BCE to the present to discern common features in the ancient customs and native religions of Inner Eurasia." Ken Teague, Asian Affairs