Thirteen-year-old Annat and her older brother, Malchick, leave their sheltered upbringing and reunite with their father, a shaman-healer. With him they venture into the magical kingdom of La Souterraine. Only then and there do they learn what their heritage means to them and to those around them.

As crows return to the skies over Masalyar, dark magic is at work. When Annat's brother vanishes from his university, the young shaman and her aunt Yuste set out to find him. But soon they learn that Malchik is not the only one in danger; a Magus from Sklava wants to raise an old enemy from the dead, and for that he needs both Malchik and Annat's souls, and the heart of their father, thrice-powerful shaman Yuda Vasilyevich. With Annat and Malchik captive in the Glass Mountain, an army under the Doyen of Ademar marching on their homeland and a trap laid for Yuda, Yuste may be the only one who can save her family - and her country. But Yuste lost her powers years ago; and her only allies are a burned-out shaman-detective, an old warrior, and the Doyen's youngest son. In the forests of the North, Yuste must confront her true self, her twin brother - and the wolves.

Sophie Vasilyevich is a teenager growing up in Anglond, the child of exiles. Sometimes grass springs up where she walks, and her future holds an unusual fate: she is going to be kidnapped when she is sixteen, and no one can stop it. Taken between worlds to the city of Bath in 1920's England, Sophie meets a young man called James Carnwallis, once a pilot in the Great War. But even as she falls in love, she learns more about the forces at work - and her fate in their plans. As an alliance of shamans, ghosts and gods assembles in a desperate attempt to recover Sophie and prevent the destruction of their worlds, they find that their only hope may lie in Sophie's gift, and in the Greenwood: a power older than time itself.