Matthew Corbin suffers from severe obsessive-compulsive disorder. He hasn't been to school in weeks. His hands are cracked and bleeding from cleaning. He refuses to leave his bedroom. To pass the time, he observes his neighbors from his bedroom window, making mundane notes about their habits as they bustle about the cul-de-sac. When a toddler staying next door goes missing, it becomes apparent that Matthew was the last person to see him alive. Suddenly, Matthew finds himself at the center of a high-stakes mystery, and every one of his neighbors is a suspect. Matthew is the key to figuring out what happened and potentially saving a child's life... but is he able to do so if it means exposing his own secrets, and stepping out from the safety of his home?

Lisa Thompson returns to the world of her acclaimed novel The Goldfish Boy with this page-turning mystery. Melody Bird has discovered an abandoned old building on the edge of town... It's a dark, creepy place, but she can't resist its pull. When she goes to explore, she finds a mysterious boy hiding out there. Hal tells Melody that he is a spy-in-training, using the house as a base for his undercover surveillance of a nearby suspected criminal. He's very secretive about the details, but Melody comes to trust him and starts helping him with his mission. Melody is determined to decode the strange riddles Hal finds hidden in the graveyard, but her friends Matthew and Jake question Hal's story. They decide to turn the tables and find out the truth about him, uncovering the biggest mystery of all . . . This extraordinary novel set in the world of The Goldfish Boy is a page-turning mystery with a sensitive story about friendship and trust at its core.