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One man’s dark deal with the Nazis could bring the Allies to their knees…

Autumn, 1942. Rule-breaking OSS Agent Conor Thorn is busy helping the Allied war effort when a key Swedish cryptographer stationed in the UK goes missing. Conor Thorn is determined to find him before critical information falls into enemy hands, but when his MI6 colleague vanishes trailing the code-breaker to Stockholm, Thorn is plunged yet again into a sinister Nazi conspiracy.

Can Thorn stop prized secrets from triggering more wartime carnage?

The Ultra Betrayal is the second novel in the thrilling Conor Thorn spy series. If you like harrowing historical drama, riveting espionage, and fast-paced action, then you’ll love Glenn Dyer’s well-researched World War II adventure.

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A tantalizing premise set among the ominous atmosphere of World War II, there’s sizzle and plot twists galore — more than enough to satisfy any thriller reader. Enjoy the latest in the Conor Thorn Series.

Steve Berry, New York Times and #1 Internationally Bestselling Author

Glenn Dyer's The Ultra Betrayal is a historically-accurate, action-packed World War II spy thriller with enough daring adventure and carefully-prepared plot twists to keep the reader avidly turning pages until the final conclusion.


Long captivated by the events of World War II, Glenn Dyer couples this fascination with his passion for historical thrillers with the publication of The Torch Betrayal and The Ultra Betrayal, both books in the Conor Thorn Series. He resides in Park City, Utah with his wife Chris and a real food hound named Murphy Brown. They have three children, all of whom live too far away.