The wind was sharper this close to the water. Hands trembling, Astrid hurried to zip her jacket before the ride operator checked her seatbelt. She wished her tremors had more to do with the chill in the air—even colder, now that the sun had set—and less to do with abject terror. When Julia asked her to come to Cedar Point, Astrid had said yes without thinking. She'd never been a fan of amusement parks, but she was a sucker for smart girls, especially smart girls like Julia. The car jolted into place and Astrid's heart lurched with the realization that it was too late to back out. She clung t