The Last Kingdom, by Bernard Cornwell.

The premise: in a dark ages, divided England, a young English boy is second in line to inherit his family’s Kingdom after his father Uhtred and his older brother Uhtred. But life is hard, harsh, and the Danes have come to invade: first drawing his older brother from the castle to kill in an ambush, then destroying the combined armies of his father and allies in war. Captured by the enemy, the young heir must now survive in a world where the war to reclaim England feels like it will never end…

I was intrigued after the first chapter. The story is strong, and the narrative compelling. Can’t wait to find out where it goes from here.