The Three Kings of Cologne — Kate Sedley

When the remains of Isabella Linkinhorne, who disappeared twenty years earlier and was known to have had three secret lovers, are discovered on nunnery land, Roger the Chapman is called in. Faced with the task of tracking down three people of whom he knows next to nothing, Roger nicknames them Caspar, Balthazar and Melchior after the Magi the Three Kings of Cologne.. .