Espionage

Guns of the Gods

The Sign of the Stranger

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

Britain's Deadly Peril

The Last Million: How They Invaded France—and England

The International Spy

The Truants

Jim Brent

The Traitor's Gate

The Seven Conundrums

Passers-By

Behind the Throne

Number Six

Guilty Bonds

Clubfoot the Avenger

Crescent and Iron Cross

Stalemate

The Red Room

The Texas Hawks; or, The Strange Decoy

A Maker of History