October, 1942. Rule breaker OSS Agent Conor Thorn is assigned a mission to help the Allied war effort when a key Swedish cryptographer stationed in England goes missing. Thorn is determined to find him before critical information falls into enemy hands. But his MI6 colleague, Emily Bright, vanishes trailing the codebreaker to Stockholm, plunging Thorn into a sinister Nazi conspiracy.

Suspicious of the cryptographer's wife and racing against time to prevent damaging leaks, Thorn mounts a daring operation. But if the bold agent's plan fails, he risks compromising Allied tactics and jeopardizing thousands of valiant lives.

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.