Inspired by the Persephone myth, this stunning conclusion to the Everneath trilogy—whose captivating first book earned a VOYA Perfect Ten of 2011 and a Whitney Award—explores the resilience of the human spirit and the indomitable power of true love.Now that Nikki has rescued Jack, all she wants is to be with him and graduate high school. But Cole tricked Nikki as they journeyed through the labyrinth of the Everneath together, and now she's begun the process of turning into an Everliving herself. Nikki and Jack begin a desperate attempt to reverse the process, using everything they can think of. Even Cole has become an unlikely ally—but for how long? Nikki needs to feed on Cole to survive, Cole needs Nikki to gain the throne in the Everneath, Jack needs Nikki because she is everything to him—and, together, they must travel back to the Underworld to undo Nikki's fate and make her mortal once more.Will Nikki be forced to spend eternity in the Underworld—or does she have what it takes to bring down the Everneath once and for all?