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 has been rewritten. Abby discovers that a cosmic collision of parallel universes has erased her old reality. Now Abby is falling in love with a boy from her Parallel's memories—a boy she's never even met. She's living the life she always wanted, but what if living her Parallel's life means she loses her soul mate?