Holy Sister by Mark Lawrence

In the thrilling conclusion to the trilogy, the story follows Nona Grey as she navigates the treacherous path of destiny, friendship, and power. As the ice advances and the empire teeters on the brink of war, Nona must harness her formidable skills and the bonds she has forged at the Convent of Sweet Mercy to confront the looming threats. With the stakes higher than ever, she faces her past and the dark forces that seek to control her future, culminating in a gripping battle where loyalty and courage are tested to their limits.

Purchase from Bookshop.org