Apex Predator (Horizon #4)

The journey through the rift becomes even rockier as the survivors are forced to take to the water, crossing a vast deepwater basin on improvised boats. To make it, 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 alive. New York Times best-selling author and National Book Award winner M.T. Anderson (Feed) helms this heart-pounding voyage in the epic survival series begun by Scott Westerfeld (Uglies).