Solaris, written by Stanislaw Lem, is a philosophical science fiction novel that explores the mysteries of an alien ocean on a distant planet. The story follows a psychologist who is sent to a space station orbiting Solaris, where the ocean has the ability to manifest the deepest fears and desires of the crew members. As the protagonist tries to understand the nature of the alien artifact, he is confronted with his own inner demons. Solaris is a haunting and introspective novel that delves into the complexities of human consciousness.