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The Hypersonic (Espionage Thriller Series Book 4) Audible 
The Secret World Best Value Penguin 
The Spy and the Traitor: The Greatest Espionage Story of the Cold War Binding : PaperbackDirectorate Press 
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A Spy Alone: A compelling modern espionage novel from a former MI6 operative: 1 A Spy Alone : A Compelling Modern Espionage Novel From A Former Mi6 Operative
Asset One (A Lara King Espionage Thriller—Book 1) The Barista's Guide To Espionage: An Eva Destruction Novel Audible To Catch a Spy: The Art of Counterintelligence D. A. 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