Jack Sharkey 
The Smart Ones [EPUB ebook] 
Who Will Survive the Atomic War?

After a tense UN standoff, nuclear war breaks out and a small group of neighbors struggle with the decision to hunker down or try to escape Earth. Some place faith in an unfinished spaceship, while others have prepared shelters. As society unravels, the characters reveal their principles, prejudices and true natures. This propulsive 1963 story explores how people might respond to catastrophe.