The Blade Itself

Infamous Logen Ninefingers has finally run out of luck. Caught in one feud too many, he's on the verge of becoming a dead barbarian. He is caught in murderous conspiracies and old scores, along with Captain Jezal dan Luthar, Inquisitor Glokta and the wizard Bayaz, who all must try to survive the coming war.

Joseph Edward Abercrombie is a British fantasy writer and film editor. He is the author of The First Law trilogy, as well as other fantasy books in the same setting and a trilogy of young adult novels. His novel Half a King won the 2015 Locus Award for best young adult book.

Source: https://en.wikipedia.org/wiki/Joe_Abercrombie