Captain Robert Nairac was a brilliantly successful undercover operative in the British Army, with a string of intelligence coups in the war against the IRA. But, until this book, the nature of his operations and the story of his betrayal and murder have remained shrouded in mystery. John Parker - author of a bestselling official history of the Special Boat Section - has obtained unprecedented co-operation from very senior Army sources, and from Nairac's friends and family, to reveal the truth behind the secret war in Northern Ireland - and the ferocious rivalry between MI5 and MI6 that contributed to Nairac's death. This book is a tribute to the heroism of Nairac and all those in Northern Ireland who gave their lives in the battle against terrorism.