Most Popular Books
- Critical study of the history of Bulgaria
- Historical-critical research. Volume 1. Ancient and present Bulgarians in political, folk-written, historical and religious relations with Russians.
- The ancient and present Slovenians. Their Political, historical and religious relation to Russians Volume 2
- On the source of folk poetry in general, and the southern Russian in particular
- Skandinavomania and her fans or centennial survey of the Vikings. Historical and critical reasoning
