Nuclear weapons are irrelevant for these real threats to India's security; the large-scale conventional and nuclear conflicts Kalam wants to deter with nuclear weapons belong to a bygone age. But his mindset reflects that of the defence and nuclear scientists, and it is their story that Chengappa tells us. As he admits: "This book will provide never before published insights into the minds of those who were involved both in the decision-making process and in the building of the bomb. It is a compelling narrative and I have written the book in a style that demystifies the subject..."