Having grown up during the end of the Cold War, I related to the ideas in this book. Bomb Shelters, Duck and Cover drills, threats of nuclear war.
In this novel, it actually happens and the story takes place between life in the bomb shelter and flashbacks leading up to the blast.
Life questions are dealt with as decisions are made in who should be allowed in; who should be given more food; should some be allowed to die: etc.
Heavy ideas! This book deserves a teacher, book club, or a friend to discuss it with.