"Half a War" is the concluding book in the Shattered Sea trilogy by Joe Abercrombie. It follows the story of Yarvi, a young prince who must navigate the complexities of war and politics as he seeks to unite the kingdoms against a common enemy. The narrative explores themes of loyalty, sacrifice, and the harsh realities of leadership. The novel features a diverse cast of characters, including Rulf, a fierce warrior, and Gorm, a cunning strategist. As they face betrayal and shifting alliances, the characters must confront their own beliefs and motivations, ultimately leading to a gripping conclusion that ties together the series' overarching conflicts.