The Knife of Never Letting Go is a young adult science fiction novel written by British American author Patrick Ness. It was published by Walker Books on 5 May 2008. It is the first book in the Chaos Walking series, followed by The Ask and the Answer and Monsters of Men. The story follows Todd Hewitt, a 12-year-old boy who runs away from Prentisstown, a town where everyone can hear everyone else's thoughts, after learning of a secret about its past.