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 Azas story with shattering, unflinching clarity. I've been working on Turtles All the Way Down for years, and Im so excited to share it with readers this October, says John Green. This is my first attempt to write directly about the kind of mental illness that has affected my life since childhood, so while the story is fictional, it is also quite personal."