With a Broken Sword by Stefon Mears
One knight stands between invaders and conquest.
His secret mission ended in an ambush. Now Ser Colin awakens on a battlefield under the bodies of his friends, the last knight still alive. And the invaders have seized the town of Three Bridges, with water access to the whole kingdom. How can one lone knight lead a ragtag group of townsfolk to victory over warriors and wizards?