What is "warday"

Warday is a novel by Whitley Strieber and James Kunetka, first published in 1984. It is an account of the authors traveling across America five years after a limited nuclear attack in order to assess how the nation had changed after the war. The novel takes the form of a research article and is written in first-person narrative form. It includes mock government documents and interviews with individuals regarding the events and aftermath of the war.