The Obernewtyn Chronicles #7: The Sending

Once shunned as a Misfit for the powers that set her apart, Elspeth Gordie has finally found happiness and love. But when she receives the long-awaited summons to begin her final quest, she must slip out in the night and leave all that she loves behind without saying a single goodbye. Elspeth sets off across the toxic Blacklands with the help of a pack of mutant wolves to find the ancient weapons that once loosed chaos and death upon the world. Those weapons have begun to stir. . . .