I had seen this book in Waterstones and I did wonder what it would be like.
Nuclear War by Annie Jacobsen describes the scenario that could possibly occur if at first a single missile was launched at the United States.
Until now, no one outside official circles has known exactly what would happen if a rogue state launched a nuclear missile at the Pentagon. Second by second and minute by minute, these are the real-life protocols that choreograph the end of civilisation. Decisions that affect hundreds of millions of lives need to be made within six minutes, based on partial information, in the knowledge that once launched, nothing is capable of halting the destruction.
It was a really interesting read and in the current political environment it is also a little scary as well.