From "New York Times "bestselling author Margaret Peterson Haddix comes the first book in a brand-new thrilling series about twins who are on a quest to discover the secrets being kept by their new family.
Nick and Eryn s mom is getting remarried, and the twelve-year-old twins are skeptical when she tells them their lives won t change much. Well, yes, they will have to move. And they will have a new stepfather, stepbrother, and stepsister. But Mom tells them not to worry. They won t ever have to meet their stepsiblings.
This news puzzles Nick and Eryn, so the twins set out on a mission to find out who these kids are and why they re being kept hidden."