- Abel The Russian Monk and Seer
- Helena Roerich: Living Ethics and the Teaching for a New Epoch
- A History of Russian Christianity: The Synodal Era And the Sectarians 1725 to 1894
- A History of Russian Christianity: Tsar Nicholas II to Gorbachev's Edict on the Freedom of Conscience
- A History of Russian Christianity Volume 1: From the Earliest Years Through Tsar Ivan IV