"The Knife of Never Letting Go" is a young adult novel by Patrick Ness. It follows the story of Todd Hewitt, a boy living in a dystopian world where all thoughts are audible, known as Noise. As he approaches his thirteenth birthday, Todd discovers a secret that forces him to flee his hometown, accompanied by his dog, Manchee. Throughout his journey, Todd encounters various characters, including Viola, a girl who challenges his understanding of the world. The novel explores themes of identity, trust, and the consequences of a society where privacy is nonexistent, ultimately leading Todd to confront difficult truths about himself and his community.