From the #1 New York Times best-selling author of the Darkest Powers novels comes the first book in a thrilling supernatural series. Teenaged Maya lives in a medical research town on a claustrophobic island of about 200 people. Suddenly, strange things start happening. The swim team captain drowns in a calm lake. Mountain lions linger around Maya's house and won't leave. And a new bad boy has appeared in town, showing a keen interest in Maya's paw-print birthmark.