X-Men meets Marissa Meyer's Renegades when New York Times bestselling author of the Uglies series Scott Westerfeld teams up with award-winning authors Margo Lanagan and Deborah Biancotti in the final book of an explosive trilogy about six teens with unique abilities. After the shocking conclusion to Swarm, the zeroes are scattered, on the run, and desperate. They're up against challenges from within and from the world around them, and one thing is certain--an epic showdown is guaranteed.