автордың кітабына ұқсайтындар  The Secrets of Potsdam

William Le Queux

The Sign of Silence

The Seven Secrets

The Mystery of the Green Ray

The Invasion

The Doctor of Pimlico / Being the Disclosure of a Great Crime

Mademoiselle of Monte Carlo

The Golden Face / A Great 'Crook' Romance

The Czar's Spy / The Mystery of a Silent Love

The White Lie

Spies of the Kaiser / Plotting the Downfall of England

The House of Whispers

The Great White Queen / A Tale of Treasure and Treason

The Stretton Street Affair

The Count's Chauffeur

The Intriguers

The Closed Book / Concerning the Secret of the Borgias

Devil's Dice

The Temptress

The Under-Secretary