Turtles All the Way Down is the story of sixteen-year-old Aza Holmes, a young woman looking for clues in the disappearance of a fugitive billionaire, while grappling with mental illness. Turtles All the Way Down begins with a fugitive billionaire and a cash reward. It is about lifelong friendship, the intimacy of an unexpected reunion, Star Wars fan fiction, and tuatara. But at its heart is Aza Holmes, a young woman navigating daily existence within the ever-tightening spiral of her own thoughts. In his long-awaited return, John Green tells Aza s story with shattering, unflinching clarity.