What is the name of the novel that is a collection of individual accounts narrated by an agent of the United Nations Postwar Commission, and where its stories are included in "The New Dead," an anthology of Zombie short stories edited by Christopher Golden?  
The New Dead:  The stories contained in it were written by authors including Max Brooks, author of "World War Z" and "The Zombie Survival Guide". World War Z:  The novel is a collection of individual accounts narrated by an agent of the United Nations Postwar Commission, following the devastating global conflict against the zombie plague.
World War Z