This is a book about the amazing adventures of the soul in the subtle world. The author is a famous French astronomer of the 19th century, who wrote a number of books on astronomy and life in the subtle world. His books enjoyed wide popularity. The novel awakens the reader's imagination with ideas about interplanetary travel at speeds close to the speed of light, given by Einstein in his theory of relativity 30 years later. The novel is built on a dialogue between the student Quaerens (Latin for “Questioner, Seeker”) and the teacher Lumen (Latin . “Light”, in the context of the novel - “The Light (Knowledge) Bringer”).

Published according to the publication of the Institute of Human Studies, series “Literature”, vol. 2. Tomsk, “Banner of Peace”, 1995. This is the first edition of the novel in Russia after a century-long break.