Espionage

Dave Dawson with the Commandos

Watching on the Rhine

The long patrol

Under the periscope

The Silent Alarm

Fortunes of War

The Blue Envelope

Thank You, Mr. Moto

Hawk Eye

Spies and Secret Service

Rescuing the Czar

The Emperor and his Double

The Black Tiger

The Secret Dispatch; or, The Adventures of Captain Balgonie

Over the border

The white cipher

The Escape Agents

The Black Venus Contract

The Skeleton Coast Contract

The Canadian Bomber Contract