The rock paintings and engravings of southern Africa have long been considered obscure, yet research has managed since to piece together that message, and we now know that this beautiful and detailed art tells us about the religious experiences of the San (bushmen) who made it: centuries ago the San believed that the art carried messages from the spirit world. This book traces the story behind that research, how it started, its failures and successes, and some of its debates, linking the art to the people who made it.