Staying Fat for Sarah Byrnes, a young adult novel by Chris Crutcher, tells the story of Moby, a high school senior whose best friend, Sarah Byrnes, is hospitalized and refusing to speak. Moby loves Sarah as a friend, and is willing to stay overweight so she doesn't feel insecure about her scars. He believes that while he can lose weight and be "normal", Sarah will be stuck with her scars forever.