A romantic, mind-bending novel about parallel worlds, soul mates, destiny, and the big-time consequences of even our smallest choices, perfect for fans of The Future of Us and Before I Fall. Abby Barnes had it all planned out--high school, college, career--but one decision made in her senior year of high school changed her carefully mapped-out future. When Abby wakes up the morning of her eighteenth birthday, it's as though her past...