The Spies of Hartlake Hall: Patrick Gallagher 2

Set during the final stages of World War I, The Spies of Hartlake Hall by R. L. Graham is a historical crime novel that follows intelligence agent Patrick Gallagher as he investigates a mysterious death inside a secretive Admiralty organization. When a body is discovered in a locked room with a dangerous secret telegram, Gallagher's inquiry unfolds during a weekend gathering at Hartlake Hall, where secrets, suspicion, and danger lurk among the guests. As bodies continue to pile up, Gallagher races against time to unmask a cunning spy hiding in the shadows.