Miranda Brooks grew up in the stacks of her eccentric uncle Billy’s bookstore, solving the inventive scavenger hunts he created just for her. But on Miranda’s 12th birthday, Billy has a mysterious falling-out with her mother and suddenly disappears from Miranda’s life. She doesn’t hear about him again until 16 years later when she receives unexpected news: Billy has died and left her Prospero Books, which is teetering on bankruptcy, and one final scavenger hunt. Miranda soon finds herself drawn into a journey where she meets people from Billy’s past, people whose stories reveal a history that Miranda’s mother has kept hidden --- and the terrible secret that tore her family apart.