The Dark Legion — Stella Samiotou Fitzsimons

They have waited for her all these years, even before she was born. She lives hidden from their vulture-like drones, hidden in the dark, cavernous lair of her enemies.
The unseen ones will come for her. They must come for her. Their very existence depends on finding her, the girl with the gift of light, of power, of life.
Haunted by a past she does not understand, by a destiny they plan for her, Freya must leave the Saviors behind, leave Damian and Finn, leave even little Pip and embark on a perilous journey with a beastly warrior.
She will venture out beyond the ends of the charted lands, risking all she holds dear to cross the dead zone to where the Dark Legion awaits.