On the Beach by Nevil Shute was similar, not about nuclear winter but about radiation killing everyone. https://en.wikipedia.org/wiki/On_the_Beach_(novel) https

On the Beach by Nevil Shute was similar, not about nuclear winter but about radiation killing everyone. https://en.wikipedia.org/wiki/On_the_Beach_(novel) https://en.wikipedia.org/wiki/On_the_Beach_(novel)