The Unwanteds - Islands of Shipwrecks by Lisa McMann

Alex and his friends from Artimé are stranded on a newly discovered island after barely surviving a storm that destroys their ship. And it turns out they’re not alone…

Back in Quill, Aaron’s power base grows as he aligns himself with an unlikely ally. Together, the two enact a drastic, risky plan to finally conquer Artimé—a plan that could ultimately leave everyone in both Artimé and Quill in far more danger than Aaron realizes.