The book “Bulgarian Secrets” by Andrey Kudin is a unique immersion into the history of Bulgaria with an experienced guide. The guide, in this case, is the author himself—a Russian scholar specializing in the history of religions, Doctor of Theology, and author of numerous monographs and articles on the economic and spiritual development of countries in Asia and Europe. To make the journey as engaging as possible, the writer found an intriguing form for telling this Balkan country’s story by revealing its many secrets—not only connected to chronicles and archaeological excavations, but also to treasure hunts, traces of extraterrestrial civilizations, and investigations of high-profile criminal stories. The book covers a vast historical period—from the times when the Bulgarian state had not yet existed, up to the present day. The edition is intended for a wide readership.