The Fimbul Winter. War Of Ragnarok, #1

Sigurd is a young warrior, the most powerful in Midgard and invincible since he bathed in the dragon's blood. But his world crumbles with the arrival of the Fimbul Winter. Famine, plagues, and death will drive brothers to kill each other and unleash the basest instincts of human behavior. From the bloody battles will emerge a coalition of heroes, who must overcome numerous dangers and put their beliefs to the test during humanity's most tragic event: Ragnarok, the end of the world according to the Norse. Respecting the worldview of those peoples, and despite the more than a millennium that separates us, this novel draws on the cyclical nature of human behavior that has unfolded throughout history and beyond borders.
Faced with adversity, some men become victims, others, heroes.