Book The Devils — Joe Abercrombie

Plague and famine stalk the land, greedy princes care for nothing but their own ambitions, and an ancient evil lurks beyond the edges of the map..

When only dark paths lead towards the light - paths the righteous dare not tread - the Chapel of the Holy Expediency steps forward. Its congregation of cursed monsters and convicted heretics will cross every line, commit every sin, and turn every mission into a disastrous bloodbath in the service of the greater good.

Now the hapless Brother Diaz must somehow bind the worst of the worst to a higher cause: to put a thief on the throne of Troy, and unite the sundered church against the coming apocalypse.