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.