Sphere is a science fiction novel written by Michael Crichton, published in 1987. The story revolves around a group of scientists who are sent to investigate a mysterious alien spacecraft discovered at the bottom of the Pacific Ocean. As they begin to explore the craft, they discover a mysterious sphere that seems to have the power to manifest their deepest fears and desires. As tensions rise and events become increasingly surreal, the scientists struggle to maintain their sanity and survive the challenges of the alien environment. Sphere is a gripping and suspenseful novel, with complex characters and a thought-provoking exploration of the nature of reality, the human mind, and the dangers of unchecked scientific curiosity. Like many of Crichton's works, it combines scientific concepts with thrilling storytelling to create a truly unforgettable experience.