Most books set in the time of King Arthur are fantasies focusing on Merlin's magicks, glittering armor, and tragic, high-flown affairs of the heart. As the title implies, The Killing Way is not one of those books.
Our hero is not a king's son like Lancelot or a wily wizard. His name is Malgwyn ap Cuneglas, and before the Saxons overran his village, killing his beloved wife, he was simply a farmer. For revenge, he gladly and madly joined up with young Lord Arthur's band to slay as many Saxons as possible. He proved an able and trusted lieutenant and for a while peace is restored to the land though at a terrible price for Malgwyn.