Aria Patel likes stability, certainty, predictability. It’s why she’s so into science. It's why she dumped her boyfriend before they went to different colleges because the odds were that something would go wrong, eventually. In a life that’s already so chaotic, why obsess over complicated relationships and shadowy unknowns when the scientific method gives you direction and a straight path to avoid all the drama. But there’s no avoiding anything when Aria finds herself suddenly falling through parallel universes and there’s no formula that can save her.

Irene Park loves romance novels—so much so she’s made a career of them as an online book reviewer with a massive following. But Irene’s real life dating story? Non-existent. So when she starts her freshman year of college, she sets her sights on finding true love using the one thing she really understands…romance book tropes. If only it were that easy. Enter Aiden Jeon, Irene’s online book review rival and biggest nemesis.

Growing up in the public eye, Kia would gladly give up her privileged life as the daughter of a reality star for the freedom to find her own way—go to high school parties, gossip with the drama club, apply to college, make mistakes, and fall in love like any other teen. Then she meets Cass, and he offers a glimpse at the ordinary life she craves. But Cass is a rising star in his own right, and what starts as something sweet and undefined soon becomes a magnet for rumor and speculation—as if first love wasn’t messy enough on its own.

Phoebe “Phibs” Ray is never more at home than when she’s underwater. On a dive six months ago, she and her four closest friends discovered a handful of ancient gold coins, rocketing them into social media fame. Now, their final summer together after high school, they’re taking one last trip to a distant Australian island to do what they love most – scuba dive.

When Chloe Torres plans the perfect summer to reunite her estranged BFFs—a cross-country road trip to see their favorite boy band!—there’s only one difficulty… getting them to actually go along for the ride.