The author of this famous book formulates his task very clearly: “to introduce the reader to a circle of hypotheses that are completely outside the boundaries of materialistic theology, philosophy and science.” And despite the fact that the material being systematized is extremely diverse and contradictory, in the sea of occult literature, the “Encyclopedic Presentation...” stands out for its rationalistic approach, completeness of presentation and documentary nature of the material. The author's unique, comprehensive scientific work was appreciated by his contemporaries and, of course, deserves the attention of a wide range of readers.