The Sixth Cavalier

From the back of the book: Hubrimort is a small, respectable town whose only claim to fame is a local governmental position bestowed by five of the king's chosen officials, known as the Cavaliers. The position is given to the head of one of four noble families once each decade. While competition for the mysterious position is always fierce, this year there are rumors of underhanded deals with criminals, rigged tournaments, and a nasty case of blackmail. Which of the ancient families deserves ten years of power and privilege? Only the Sixth Cavalier can help the five officials make the right choice!