A Sleight of Shadows

"After taking down the source of the corruption of the Unseen World, Sydney is left with almost no magical ability. Feeling estranged from herself, she is determined to find a way back to her status as one of the world's most dangerous magicians. Unfortunately, she needs to do this quickly: the House of Shadows, the hell on earth that shaped her into who she was, the place she sacrificed everything to destroy, is rebuilding itself."--