The Sentinel (novel)

"The Sentinel" is a science fiction novel co-authored by Arthur C. Clarke and Gentry Lee, published in 1983. It explores themes of extraterrestrial life and humanity's place in the universe. The story follows a mission to a distant moon, where a mysterious structure is discovered, believed to be a relic left by an advanced alien civilization. As characters uncover its secrets, they confront profound questions about intelligence, existence, and the future of humanity. The novel is known for its blend of scientific speculation and philosophical inquiry, reflecting Clarke's fascination with space exploration and the unknown.