(Description nicked from B&N.com.)
“Elisha, a barber-surgeon from the poorest streets of benighted fourteenth-century London, has come a long way from home. He was always skilled at his work, but skill alone could not protect him on the day that disaster left his family ruined and Elisha himself accused of murder. With no other options, Elisha accepted a devil’s bargain from Lucius, a haughty physician, to avoid death by hanging—by serving under the sadistic doctor as a battle surgeon of the king’s army, at the front lines of an unjust war.
Elisha worked night and day, both tending to the wounded soldiers and protecting them from the physician’s experiments. Even so, he soon found that he had a talent for a surprising and deadly sort of magic, and was drawn into the clandestine world of sorcery by the enchanting young witch Brigit—who had baffling ties to his past, and ambitious plans for his future. Yet even Brigit did not understand the terrible power Elisha could wield, until the day he was forced to embrace it and end the war…by killing the king.