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2-Book Spy Thriller Bundle — Credible Dagger + Knight to King 6 (Cold War Series)

2-Book Spy Thriller Bundle — Credible Dagger + Knight to King 6 (Cold War Series)

$39.95 USD
$49.46 USD $39.95 USD
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Two Riveting Cold War Spy Thrillers — One Mission: Survive the Truth

Get both paperbacks for only $39.95 (Save 20%)

Step into the shadowy world of espionage where every move could start—or stop—a world war.

Credible Dagger

Nazi-occupied Yugoslavia, 1944.
A covert Allied team parachutes behind enemy lines to uncover the truth about a resistance leader code-named Credible Dagger. What they discover will shape the outcome of the war—and be buried for decades.

Knight to King 6

Poland, 1946.
As the ashes of World War II settle, British and American agents race against the Soviets to recover advanced Nazi missile technology. The Cold War is about to begin—and only one side can win the race to the future.

About the Author

Gregory M. Acuña is a retired American Airlines Captain and former USAF pilot who flew global missions during the Cold War. Drawing from years of experience in military aviation and intelligence operations, Acuña delivers authentic historical thrillers that blend real events, suspense, and heart-stopping realism.

Why Readers Love These Thrillers

  • Based on real declassified Cold War operations
  • Riveting realism from an author who’s lived it
  • Perfect for fans of Tom Clancy, Ken Follett, and John le Carré
  • “I couldn’t put it down — every page feels real.” ★★★★★

Limited-Time Offer

Get both paperback editions for just $39.95 (normally $49.46).
Supplies are limited — grab your set before this mission ends.

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Secure checkout • Ships directly to your door from the author • Risk-Free satisfaction guarantee

What’s Included

  • Credible Dagger (Paperback – 336 pages)
  • Knight to King 6 (Paperback – 352 pages)
  • Exclusive author note: “The Real Operations Behind the Fiction”


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Two Cold War Thrillers in One Explosive Bundle

Save 20 Percent Today Only

Step inside a world filled with covert missions, double agents, and intelligence secrets hidden for decades. The 2 Book Spy Thriller Bundle delivers two pulse pounding historical thrillers written by a pilot who lived through the realities of Cold War operations.

For a limited time you can get both paperbacks for $39.95 instead of $49.46. This special price will not last long.

Special Offer

2 Paperbacks. One Unforgettable Mission.

✔ Both full length novels

✔ Premium paperback format

✔ Ships directly to your door from the author

✔ Risk free satisfaction guarantee

✔ Buy direct from author, No Amazon, Nook or Apple. Just you supporting the author.

The Stories Inside the Bundle

Credible Dagger

Nazi occupied Yugoslavia, 1944.

An Allied infiltration team jumps behind enemy lines to verify the truth about a mysterious resistance figure known only as Credible Dagger. What they uncover holds the power to influence the end of the war and remain buried for generations.

This is a tense and atmospheric thriller filled with betrayal, survival, and secrets locked inside wartime Europe.

Knight to King 6

Poland, 1946.

The war has ended but the battle for power has only begun. British and American agents compete with Soviet intelligence to recover advanced German missile technology before a new global conflict ignites.

This is the moment the Cold War begins. Only one side can control the weapons that will shape the future.