The Secret of Chimneys (Superintendent Battle Book 1)
From the publisher: "What is The Secret of Chimneys? A young drifter finds out when a favor for a friend pulls him into the heart of a deadly conspiracy in this captivating classic from Agatha Christie. Little did Anthony Cade suspect that an errand for a friend would place him at the center of a deadly conspiracy. Drawn into a web of intrigue, he begins to realize that the simple favor has placed him in serious danger. As events unfold, the combined forces of Scotland Yard and the French Sûreté gradually converge on Chimneys, the great country estate that hides an amazing secret."