автордың кітабына ұқсайтындар The Count's Chauffeur
The Sign of Silence
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The Seven Secrets
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The Mystery of the Green Ray
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The Invasion
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The Doctor of Pimlico / Being the Disclosure of a Great Crime
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Mademoiselle of Monte Carlo
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The Golden Face / A Great 'Crook' Romance
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The Czar's Spy / The Mystery of a Silent Love
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The White Lie
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Spies of the Kaiser / Plotting the Downfall of England
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The House of Whispers
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The Great White Queen / A Tale of Treasure and Treason
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The Stretton Street Affair
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The Intriguers
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The Secrets of Potsdam
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The Closed Book / Concerning the Secret of the Borgias
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Devil's Dice
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The Temptress
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The Under-Secretary
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