'Blood Heir' is the first book in the Aurelia Ryder series, a spin-off set in the world of the Kate Daniels series. It follows Julie Lennart-Olsen, who returns to Atlanta after years away, only to find herself framed for a murder she did not commit. As she navigates a city changed by magic and politics, she must use her developing powers and wits to clear her name and protect those she loves.