The first medieval mystery featuring physician Kathryn Swinbrooke.
A serial killer haunts 15th-century Canterbury. Kathryn Swinbrooke is an independent practitioner of medicine, discovering the benefits of an apple-rich diet for teeth, and prescribing herbs and vinegar for almost every known malady. Canterbury's tourist trade, already jeopardized by the War of the Roses, is further imperilled by a spate of poisoned pilgrims, each corpse accompanied by the appearance of a line or two of rough verse, in style remarkably similar to Geoffrey Chaucer's soon-to-be famous work. Suspecting the murderer is a doctor, the Archbishop asks for Kathryn's help. In a fascinating hunt that pits her against the august town physicians, Kathryn is aided only by her wits, her foul-mouthed, warm-hearted servant Thomasina, and Colum Murtagh, a powerful Irish mercenary.