Tom Marcus, former MI5, grew up on the streets in the North of England. He joined the Army at sixteen and went on to became the youngest member of the Armed Forces to pass the six-month selection process for Special Operations in Northern Ireland. Tom was hand-picked from the Army into MI5 as a Surveillance Officer. He left the Security Service after a decade on the frontline protecting his country due to being diagnosed with PTSD. An extraordinary battle and recovery took place which led Tom to write his first book, Soldier Spy, which has been vetted and cleared for publication by MI5. It is the first true ground level account ever to be told and went straight to number one on the Sunday Times bestseller list. Tom, now consults on projects within TV and film including the TV dramatisation of his book Soldier Spy. Defend or Die is his second novel, following on from Capture or Kill. Due to the ongoing specific threat to Tom Marcus, MI5 insist he keep his identity hidden and he continues to work with the Security Service and other agencies to ensure he stays safe.