Espionage

The Lion and the Unicorn

Beryl of the Biplane

The Intriguers

The Shadow On The Dial, and Other Essays

Nobody's Man

A Secret Service: Being Strange Tales of a Nihilist

Trophy

Atropos

Operation Terror

Ruby Roland, the Girl Spy; or, Simon Kenton's Protege

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