A Grain of Truth by C. P. McGraw

Political intrigue boils, marauding gangs attack, mysterious deaths occur, and war threatens to break out again. It is 1364. French conspirators want to gain control over the wealthy region of Aquitaine no matter how many deaths it takes. A hired assassin is on the loose, leaving a trail of victims behind in pursuit of his target. 'A Grain of Truth' tells the story of HENRI and his quest to save his city from insanity and death.