The stories of hibakusha - Japanese for atomic bomb survivors - lie at the heart of this compelling minute-by-minute account of 6 August 1945 - the day the world changed forever as the Enola Gay dropped its payload over Hiroshima, ushering in the nuclear age. These survivors and witnesses, now with an average age of over 90, are the last people alive who can still provide us with reliable and detailed testimony about life in Hiroshima before the bombings. In this heart-stopping account they relay what they experienced on the day the city was obliterated, and what it has been like to live with those memories and scars over the rest of their lives.

M. G. Sheftall has spent years personally interviewing survivors who were just adolescents at the time but have lived well into their nineties, allowing him to construct portraits of what Hiroshima was like before the bomb, and how catastrophically its citizens' lives changed in the seconds, minutes, days, weeks, months and years afterwards. Fluent in spoken and written Japanese, his deep immersion in Japanese society has given him unprecedented access to the hibakusha in their waning years. Their trust in him is evident in the personal and traumatic depths they open up for him as he records their stories.

The result is a deeply human history of an unfathomable tragedy, which continues to haunt the world today.