Espionage

The Spy

Hawk Eye

Spies and Secret Service

The Mandarin's Fan

When Scout Meets Scout or, The Aeroplane Spy

Thank You, Mr. Moto

The Stolen Cruiser

Mystery of the Caribbean Pearls

Agent Nine and the Jewel Mystery

Four Years a Scout and Spy “General Bunker”

Dave Dawson with the Commandos

Luck on the Wing: Thirteen Stories of a Sky Spy

Watching on the Rhine

The long patrol

Under the periscope

Phantom Wires

The Blue Envelope

Fortunes of War

The Silent Alarm

Spies of the Kaiser: Plotting the Downfall of England