Espionage

The Boomerang Circuit

The Grey Lady

The Peddler Spy; or, Dutchmen and Yankees. A Tale of the Capture of Good Hope

The Stolen Cruiser

Mystery of the Caribbean Pearls

Four Years a Scout and Spy “General Bunker”

Agent Nine and the Jewel Mystery

Dave Dawson with the Commandos

Watching on the Rhine

The long patrol

Phantom Wires

Luck on the Wing: Thirteen Stories of a Sky Spy

Under the periscope

The Silent Alarm

Fortunes of War

The Blue Envelope

Thank You, Mr. Moto

Spies of the Kaiser: Plotting the Downfall of England

The German Spy in America The Secret Plotting of German Spies in the United States and the Inside Story of the Sinking of the Lusitania

When Scout Meets Scout or, The Aeroplane Spy