A search for missing artifacts drives “Blood Flag” by Steve Martini and “The Emperor’s Revenge” by Clive Cussler. In Martini’s story, a lawyer defending a client accused of murder discovers clues to a missing Nazi treasure. In “The Emperor’s Revenge”, the crew of the Oregon try to solve a violent bank heist during the Monaco Grand Prix. The robbery is connected to a search for a Napoleonic-era artifact artifact. *Note: McGuffin was Alfred Hitchcock’s pet term for a plot device that becomes an object of pursuit, such as the Maltese Falcon.