New York Times bestselling author Samira Ahmed is back with a whirlwind, universe-hopping second-chance romance that explores the very nature of self, and what it means to love someone across the universe.



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 relationships, science is something you can count on.



But there's no scientific explanation when Aria finds herself suddenly falling through parallel universes. And there's no formula to explain how she keeps meeting Rohan (her now ex-boyfriend) in every new universe she steps into.



After being ripped away from her own universe 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 ground rules for living in the multiverse, and fall in love?