David (University of Cambridge, UK) Lewis 
After Atheism [PDF ebook] 

Based on interviews with people throughout Siberia, Central Asia and European Russia about their spiritual experiences, this book brings together insights into the “religious“ worldview of those who claim to be Buddhist, Muslim, Christian, pagan or even “atheist“. Throughout the ex-Soviet Union peoples of many different ethnic backgrounds report such experiences but often do not know how to interpret them, a position helped or hindered by the fact that at the same time these people are trying to rediscover their ethnic and cultural identity.