Best Served Cold by Joe Abercrombie

Set shortly after the end of the First Law Trilogy this is another delicious tale of treachery and revenge from Abercrombie. The main protagonist is a mercenary general who's reward for vanquishing all rivals to the Duke of Talins bid for a Kingdom is for her brother to be murdered and herself mutilated and left for dead. She vows revenge on the duke and his cronies who perpetrated the evil deed. This is a stand alone novel but there are plenty of tie ins with the previous First law books. Good Stuff.