The Island by Natasha Preston

Jagged Island: a private amusement park for the very rich—or the very influential. Liam, James, Will, Ava, Harper, and Paisley—social media influencers with millions of followers—have been invited for an exclusive weekend before the park opens. They’ll make posts and videos for their channels and report every second of their VIP treatment. 

When the teens arrive, they're stunned: the resort is even better than they’d imagined. Their hotel rooms are unreal, the park’s themed rides are incredible, and the island is hauntingly beautiful. They’re given a jam-packed itinerary for the weekend.  

But soon they'll discover that something's missing from their schedule: getting off the island alive.