Ok, so this is the 5th in the series of SF Masterworks I have read in as many weeks. I cannot, so far, recommend this list enough, having started on 'I am Legend', to 'Do androids dream', 'The Forever War' and 'Time out of Joint'. So far, I have been blown away by them all, but this story has really got to me.
The other review here will tell you about the story. I don't need to repeat that. But really, I was quite unsettled by this book (which is a good thing!!!).
There was no easy solution. The story was full of twists, conspiracies and points where I actually thought about what I would do if I were faced with the same choices.
For those of us growing up in the 80's with all the propaganda about what to do in the event of a nuclear war (what were those cartoons all about?) the harsh reality of what could happen, combined with the politics and greed behind it all, is all dealt with, and in a way that seems, even today, totally believable (if you can excuse all the time travel stuff!).
Not an easy read to start with, but one you will find immensely satisfying, even if all you do is remember the total insignificance of war.