The Sending (The Obernewtyn Chronicles)

The post-apocalyptic fantasy series takes a stunning turn
Award-winning Australian author Isobelle Carmody continues the epic story of Elspeth Gordie, a heroine in the vein of Tamora Pierce's most memorable and empowering protagonists. Book seven in the eight-part Obernewtyn Chronicles, The Sending details what happens when destiny at last comes calling for Elspeth--the Seeker of legend--and her faithful animal companions.
Once shunned as a Misfit, Elspeth Gordie has found happiness and love in a world where such things are rare. But in the midst of planning a trip to the mysterious Red Land, Elspeth receives the long-awaited summons to leave all she loves. Now she must cross a range of toxic Blacklands to seek the help of a pack of dangerous human-hating wolves--for only these mutant beasts can lead her across the poisonous landscape, to the black road and the Beforetime city that haunt her dreams. Accepting the mission will cost her dearly. But to refuse--or to fail--is to condemn the world to a second apocalypse.
Fans of YA fantasy novels--those who enjoy romance and drama in a world of fantastic powers and terrible danger--need look no further than The Sending.