"Cosmic Bluff" by Mack Reynolds is an exciting science fiction book that transports readers to the distant future, full of mystery and grandeur of the universe. In this book, the writer tells about a space explorer who is forced to accept a dangerous mission to solve a puzzle, in which impossible hypotheses and dangerous mind games play a role. "Space Bluff" is an exciting journey into the world of mysterious outer spaces, where incredible discoveries and dangers await at every step.