Apex Predator

Apex Predator, the 4th book in the Horizon series, was published on August 28, 2018 by Scholastic Inc. It was written by M.T. Anderson.

Summary
Molly and her friends are survivors. They've lived through a devastating plane crash, supernatural landscapes, and technology that can warp the laws of space and time. But just when their goal seems closer than ever, the team's progress is halted by an enormous deepwater basin.

Their only way home is across this strange sea, but even the shore presents a deadly challenge. The coast is patrolled by a predator unlike anything they've seen yet, attacking whenever they come near. To cross, Molly and the others must work together. But a rift of a different kind is forming among the survivors. If they aren't careful, it could eat them from within.

New York Times bestselling author and National Book Award winner M.T. Anderson helms this heart-pounding voyage.

(Summary taken from within the book)