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.

Seventeen-year-old Aurelia Wycherley is entering her debutante season as a witch. Aurelia should be excited about finding the perfect match to tether her magic to. But her magic is cursed – dark, dangerous, and not the kind that her peers want to match with – and, without a tether, she faces losing her magic completely. But when Aurelia learns that enigmatic, aloof Jules, a member of arch enemy family the Nightlys, is searching for a way that a witch can keep their magic without tethering, she realises he may be her only hope.

Seventeen-year-old Willow always has a camera around her neck. She volunteers as a photographer at Finding Home, an animal shelter. When Willow stumbles upon a lost camera memory card, it’s filled with hundreds of photos of teenage girls. Some are smiling, others look unaware, and a few seem terrified. The police tell her taking photos in public isn’t a crime. But Willow can’t seem to let it go, especially after she finds her own photo on the card.

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.