The Greystone kids thought they knew. They’ve been a happy family, just the three of them and their mom. Everything changes when reports of three kidnapped children—who share the same names, ages, and birthdays as the Greystone kids—reach the Greystone family. Before Chess, Emma, and Finn can question their mom about it, she takes off on a mysterious work trip. But puzzling clues left behind lead to codes, hidden rooms, and a secret that will turn their world upside down.
By Margaret Peterson Haddix