An electrifying stand-alone thriller from the Edgar Award–winning writer whom Stephen King called “the next suspense superstar” Can a person ever really disappear for good by going off the grid? And what happens when vanishing is no longer an option? Sarah Keller is a single mother to five-year-old Zoe, living quietly in Oklahoma. She’s also a skip tracer, an expert in tracking people who’ve gone on the lam to avoid arrest, prosecution, or debt — pinpointing their location to bring them to justice. When a school bus accident sends Zoe to the ER, their quiet life explodes. Zoe’s medical tests reveal what Sarah has been hiding: Zoe is not her daughter. Zoe’s biological mother — Sarah’s sister, Beth — was murdered shortly after the child’s birth.