Book of the Order, book 2 : Spectyr
Philippa Ballantine2011

Though one of the most powerful Deacons, Sorcha Faris has a tarnished reputation to overcome, which is why she jumps at the chance to investigate a string of murders in the exotic city of Orithal. But it is there that her lover, the shapeshifting rival to the throne, is targeted by a cruel and vengeful goddess, unwittingly unleashed by the Emperor's sister.