It would seem that the eighteenth century, commonly called the Age of Enlightenment, should not have given rise to so many mysteries and riddles, for the great French educators, then rulers of thought, demanded that all "believe in the light of reason." But in this century, next to a whole galaxy of encyclopedists loom silhouettes of Cagliostro and the Count of Saint-Germain, it is in the XVIII century belongs not only the genius Mikhail Lomonosov, but also the warlock Jacob Bruce. The situation is no better with the rational nineteenth century - it also holds many mysteries. These are, for example, the mysteries of the life and death of several emperors - Paul I, Napoleon I, Alexander I, Nicholas I - and no less mysterious stories from the lives of famous writers: NV Gogol, Edgar Poe, AV Sukhovo-Kobylin. Our book will tell about these and many other mysterious stories