M. T. Anderson 
Apex Predator [EPUB ebook] 

From a National Book Award winner, plane crash survivors must cross a body of water protected by a dangerous predator in order to find hope of rescue.The journey through the rift becomes even rockier as the survivors are forced to take to the water, crossing a vast deep-water 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-bestselling 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).