The Liar's Throne — S.M. Reine

Nina Silverhand has never failed to assassinate anyone before Patrician Lorent. When the client tries to kill her instead -- tying up loose ends -- Nina and Lore agree to team up against their would-be killer. But first they have to figure out who wants his throne, and Lore has to hope it's not anyone he likes. Nina doesn't take losing kindly. And she's not one for mercy.