Gideon The Ninth by Tamsyn Muir
Book Description
The emperor needs necromancers and the ninth necromancer needs a swordsman. Gideon, who was brought up by unfriendly nuns, ancient retainers and countless skeletons is ready to abandon a life of servitude and an afterlife as a reanimated corpse. She is packed and ready to escape but her childhood nemesis wonβt set her free without a service.