Those are Real Bullets by Peter Pringle,Philip Jacobson

On January 30, 1972, British paratroopers opened fire on unarmed Irish Catholic demonstrators in Derry, killing thirteen and wounding another fourteen. Five were shot in the back. A major turning point in the recent history of Northern Ireland, the massacre galvanized Catholics in their struggle against the British presence in Ulster. In Those Are Real Bullets, Peter Pringle and Philip Jacobson provide the definitive, full-length narrative account of Bloody Sunday. Using extensive interviews and recently declassified documents unavailable for previous books about the shootings, they vividly re-create the chaos and terror of the day and capture the full human impact of the tragedy. Those Are Real Bullets provides an intimate portrait of a city in revolt and the climax of a failed military response that plunged Northern Ireland into three decades of armed conflict. "A shocking, stomach-turning, enraging narrative history that should be required reading." -- Irish Independent "Written by two veteran, first-rate reporters, this book will remain the standard account of that miserable day." -- Geoffrey Wheatcroft, Daily Mail