The Dark Frontier: A Spy Thriller (Vintage Crime/Black Lizard)

The Dark Frontier launched Eric Ambler’s five-decade career as one of the most influential thriller writers of our time.
 
England, 1935. Physicist Henry Barstow is on holiday when he meets the mysterious Simon Groom, a representative for an armaments manufacturer. Groom invites the professor to Ixania, a small nation-state in Eastern Europe whose growing weapons program threatens to destabilize the region. Only after suffering a blow to the head—which muddles his brain into believing he is Conway Carruthers, international spy—does the mild-mannered physicist agree to visit Ixania. But he quickly recognizes that Groom has a more sinister agenda, and Carruthers is the only man who can stop him.

• Background to Danger
• Cause for Alarm
• Passage of Arms: A Suspense Thriller
• Journey Into Fear
• State of Siege: A Thriller
• Epitaph for a Spy: A Spy Thriller
• The Light of Day
• Judgment on Deltchev
• A Coffin for Dimitrios
• The Schirmer Inheritance