Konungar: War of Crowns #1 — Sylvain Runberg

In the Viking kingdom of Alstavik, a violent civil war rages between two brothers who claim succession to their father’s throne. With the people’s allegiance divided, and the slaughter of innocents a daily occurrence, there is no sign of peace. Enemies of the kingdom are seizing this opportunity, and if the two brothers can’t reconcile, the return of an old and dangerous foe spells certain doom for Alstavik.