Espionage

The Sign of the Stranger

The Border Spy; or, The Beautiful Captive of the Rebel Camp

Britain's Deadly Peril

The Red Mass

My Secret Service, Vienna-Sophia-Constantinople-Nish-Belgrade-Asia Minor

Huntingtower

The Last Million: How They Invaded France—and England

Pickle the Spy; Or, the Incognito of Prince Charles

False Evidence

The Air Pirate

6,000 Tons of Gold

The chronicles of Michael Danevitch of the Russian Secret Service

The Gunner

Those Other Days

A Front of Brass

The Man and His Kingdom

The Human Touch

Expiation

The Gay Triangle

The Zeppelin Destroyer