Chaos Walking is a young adult science fiction series written by American-British novelist Patrick Ness. It is set in a dystopian world where all living creatures can hear each other's thoughts in a stream of images, words, and sounds called Noise. The series is named after a line in the first book: "The Noise is a man unfiltered, and without a filter, a man is just chaos walking." The series consists of a trilogy of novels and three short stories.