"The King in Yellow" is a collection of short stories written by Robert W. Chambers and published in 1895. The book is known for its themes of madness, despair, and the supernatural, often revolving around a fictional play also titled "The King in Yellow." This play drives those who read it to insanity, creating a sense of dread and mystery throughout the stories. The collection has influenced various works in the horror genre, including H.P. Lovecraft's writings. Its blend of psychological horror and the uncanny has made it a significant piece in the development of weird fiction, inspiring later authors and artists in their explorations of existential themes.