Book of the Ancestor

Book of the Ancestor by Mark Lawrence is the first series that is set in the world of Abeth. It is a trilogy, with an extra short story set in between books two and three. Currently all books of the trilogy have been released.

Books
Book 1: Red Sister

Book 2: Grey Sister

Book 2.5 (short story): Bound

Book 3: Holy Sister

Summary
The Book of the Ancestor follows the life of Nona Grey a poor peasant girl with three bloods and said to be the Shield of the Chosen One. It focuses specifically on her time at the Sweet Mercy convent and her relationship with friends and acquaintances such as Clera Ghomal, Arabella Jotsis, and Zole as well as her subsequent life as a Red Sister.