One expects a lot more from a book with such a title. What it actually was, in fact, was a defense of the author's idea of the origin of the Mithras cult in the Roman Empire. The idea itself is fascinating, but one expects more than such a slim volume in order to explore it. Most of the defense consists of the repetition of the phrase "one can easily imagine", making one wonder if the theory is valid, or merely the imagination of the author.