'Hilarious and heart-wrenching, romantic and searching ... a poetic, deeply profound exploration of the multiverses we inhabit' - Libba Bray, New York Times bestselling author of the DIVINERS series ' Addictive, inventive, and sometimes chilling... O ne of the most original YAs I've read in years ' - Melissa Albert, New York Times bestselling author of the HAZEL WOOD series Aria Patel believes in facts. She likes stability, certainty, predictability. It's why she's so into science. And it's why she dumped her boyfriend Rohan, before they went to different colleges - the odds were that something would go wrong eventually. Unlike love, science is something you can count on. But there's no scientific explanation when Aria suddenly finds herself falling through parallel universes. And there's no formula to explain how she keeps meeting Rohan in every new universe she falls into. After being ripped away from her world seconds before a tragedy occurs, Aria is left with two mindbending, physics-defying conudrums - can she navigate the multiverse and get home to save her family? And will she break one of her own rules to survive the multiverse, and fall in love? New York Times bestselling author Samira Ahmed is back with a whirlwind, star-crossing second-chance romance that explores the very nature of self, and what it means to love someone across the universe.