In May 1998, India shocked the world--and many of its own citizens--by detonating five nuclear weapons in the Rajasthan desert. Why did India bid for nuclear weapon status at a time when 149 nations had signed a ban on nuclear testing? What drove India's new Hindu nationalist government to depart from decades of nuclear restraint, a control that no other nation with similar capacities had displayed? How has U.S. nonproliferation policy affected India's decision making?

India's Nuclear Bomb is the definitive, comprehensive history of how the world's largest democracy, has grappled...