In January 2003, 28-year-old GCHQ translator Katharine Gun received an email from the US National Security Agency that would turn her world upside down. The message requested Katharine’s assistance in co-ordinating an illegal US-UK spy operation which would secure UN authorisation for the Iraq invasion. Horrified, she decided to leak the information to the British press. Katharine’s decision would change her life forever, as she was arrested under the Official Secrets Act whilst becoming a cause celebre for political activists. The Spy Who Tried to Stop a War is the definitive account of a whistleblower case that reads like a thriller, and will ask you the same question that was asked of Katharine that cold January day – where do your true loyalties lie?