Bulgarian Mysteries by Andrei Kudin is a kind of immersion in Bulgarian history with an experienced guide. The latter is the author himself, Russian scholar, religious studies expert, doctor of theology, and author of numerous monographs and articles on economic and spiritual development of Asian and European countries. To make the journey as fascinating as possible, the author chose an interesting way to tell the story about this Balkan country through uncovering its numerous mysteries related not only to the annals and archaeological excavations, but also to the search for treasures, traces of extraterrestrial civilizations, and investigation of high-profile criminal cases. The book covers a large historical period — from the times when the Bulgarian state did not exist to the present day. The publication is for a broad readership.