Raised by a half-mad mother who dabbled in magic, Morwenna Phelps found refuge in two worlds. As a child growing up in Wales, she played among the spirits who made their homes in industrial ruins. But her mind found freedom and promise in the science fiction novels that were her closest companions. Then her mother tried to bend the spirits to dark ends, and Mori was forced to confront her in a magical battle that left her crippled -- and her twin...