"This novel is by far [Green's] most difficult to read. It's also his most astonishing. So surprising and moving and true that I became completely unstrung." - The New York Times "A tender story about learning to cope when the world feels out of control." - People It's quite rare to find someone who sees the same world you see. Sixteen-year-old Aza never intended to pursue the mystery of fugitive billionaire Russell Pickett, but there's a hundred-thousand-dollar reward at stake and her Best and Most Fearless Friend, Daisy, is eager to investigate. So together, they navigate the short distance and broad divides that separate them from Russell Pickett's son, Davis. Aza is trying. She is trying to be a good daughter, a good friend, a good student, and maybe even a good detective, while also living within the ever-tightening spiral of her own thoughts. In his long-awaited return, John Green, the acclaimed, award-winning author of Looking for Alaska and The Fault in Our Stars, shares Aza's story with shattering, unflinching clarity in this brilliant novel of love, resilience, and the power of lifelong friendship.