The Plymouth Cloak by Kate Sedley

Set in the late 15th century, this historical mystery follows Roger the Chapman, a former monk turned itinerant peddler, who finds himself embroiled in a web of intrigue and danger. While traveling to Plymouth, Roger is tasked with delivering a secret message, but the mission takes a perilous turn when he discovers a murder and a conspiracy that could threaten the stability of the realm. As Roger delves deeper into the mystery, he must navigate a world of political machinations and hidden agendas, using his wit and intuition to uncover the truth and ensure justice is served.