Number 70, Berlin: A Story of Britain's Peril

Rasputin the Rascal Monk

Guilty Bonds

The Invasion of 1910

The Pauper of Park Lane

The Great War in England in 1897

Her Royal Highness: A Romance of the Chancelleries of Europe

The Great God Gold

Spies of the Kaiser: Plotting the Downfall of England

The Red Widow: or, The Death-Dealers of London

The Mystery of the Green Ray

Whither Thou Goest

The Price of Power

The Intriguers

An Eye for an Eye

The Mysterious Three

As We Forgive Them

The Way to Win

The Voice from the Void: The Great Wireless Mystery

Sant of the Secret Service: Some Revelations of Spies and Spying