About the book: 1991 / The novel-hypothesis "The Love Coefficient, or the Mystery of Zero" is dedicated to proving that stellar flight is possible at sub-light speed when the passage of time on a starship slows down according to Einstein’s theory, into which the concept of “mass ratio” should be introduced. The second novel “Reflection of the Stars” is about the stay of astronauts on a twin planet during the Middle Ages. The hypothetical novels of the oldest Soviet science fiction writer pose moral problems and suggest possible scientific solutions.