Question: 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?  

Context articles: Imagination Unlimited
The Best Science Fiction Stories: 1949
That Is Not Dead
Dark Forces (book)
World War Z
The Best Science Fiction Stories: 1950
The New Dead
Magical Beginnings
Wondrous Beginnings
Horrible Beginnings

Imagination Unlimited is an anthology of science fiction short stories edited by Everett F. Bleiler and T. E. Dikty, first published in hardcover by Farrar, Straus & Young in 1952.
 As originally published, the anthology includes thirteen stories by various authors, with an introduction and four brief essays by the editors.
 In the UK The Bodley Head published the work as two separate anthologies in 1953, one, containing the first six stories, under the same title as the American edition and the other, containing the remaining seven stories, as "Men of Space and Time".
 The anthology was also reprinted in an abridged paperback edition containing seven of the stories by Berkley Books in April, 1959.
 Only the original edition included the introduction and the essays.
The Best Science Fiction Stories: 1949 is a 1949 anthology of science fiction short stories edited by Everett F. Bleiler and T. E. Dikty.
 It was the first published anthology to present the best science fiction stories for a given year.
 The stories had originally appeared in 1948 in the magazines "Planet Stories", "Astounding", "Blue Book", "Comment", and "Thrilling Wonder Stories".
 The anthology was later combined with the and reissued as "Science Fiction Omnibus".
That is Not Dead: Tales of the Cthulhu Mythos Through the Centuries is an anthology of original horror short stories edited by Darrell Schweitzer.
 It was first published in hardcover by PS Publishing in February 2015.
 It shares a title with "That is Not Dead: The Black Magic & Occult Stories", a short story collection by August Derleth published in 2009.
 In both instances, the title is derived from a couplet by H. P. Lovecraft attributed to his fictional "mad poet" Abdul Alhazred: "That is not dead which can eternal lie, / And with strange aeons even death may die."
Dark Forces: New Stories of Suspense and Supernatural Horror is an anthology of 23 original horror stories, first published by The Viking Press in 1980 and as a paperback by Bantam Books in 1981.
 It was edited by New York City literary agent Kirby McCauley.
 "Dark Forces" won the World Fantasy award for best anthology/collection in 1981 and is celebrated in an essay by Christopher Golden in "Horror: Another 100 Best Books", edited by Stephen Jones and Kim Newman.
World War Z: An Oral History of the Zombie War is a 2006 apocalyptic horror novel by Max Brooks.
 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.
 Other passages record a decade-long desperate struggle, as experienced by people of various nationalities.
 The personal accounts also describe the resulting social, political, religious, and environmental changes.
The Best Science Fiction Stories: 1950 is a 1950 anthology of science fiction short stories edited by Everett F. Bleiler and T. E. Dikty.
 An abridged edition was published in the UK by Grayson in 1951 under the title "The Best Science Fiction Stories".
 The stories had originally appeared in 1949 in the magazines "Astounding", "The Saturday Evening Post", "Fantasy and Science Fiction", "Fantastic Adventures", "Maclean’s", "Thrilling Wonder Stories", "Blue Book" and "Startling Stories".
 The anthology was later combined with the and reissued as "Science Fiction Omnibus".
The New Dead: A Zombie Anthology is an anthology of Zombie short stories edited by Christopher Golden.
 The stories contained in it were written by authors including Max Brooks, author of "World War Z" and "The Zombie Survival Guide".
Magical Beginnings is an anthology of fantasy short stories edited by Steven H. Silver and Martin H. Greenberg, first published in paperback by DAW Books in February 2003.
 It is a compilation of the first published stories of sixteen prominent authors in the genre, and features introductions to the stories provided (in most instances) by the authors of those stories.
 "Magical Beginnings " was the second of three similarly-themed anthologies, its companions being "Wondrous Beginnings" and "Horrible Beginnings", compiling the first published stories of authors writing in the science fiction and horror genres, respectively.
 The series follows the example of the earlier "", edited by Damon Knight (Lancer Books, 1963) and "First Voyages", edited by Damon Knight, Martin H. Greenberg and Joseph D. Olander (Avon Books, 1981), which focused on science fiction authors only and did not include individual introductions.
Wondrous Beginnings is an anthology of science fiction short stories edited by Steven H. Silver and Martin H. Greenberg, first published in paperback by DAW Books in January 2003.
 It is a compilation of the first published stories of seventeen prominent authors in the genre, and features introductions to the stories provided (in most instances) by the authors of those stories.
 "Wondrous Beginnings" was the first of three similarly-themed anthologies, its companions being "Magical Beginnings" and "Horrible Beginnings", compiling the first published stories of authors writing in the fantasy and horror genres, respectively.
 The book follows the example of the earlier "", edited by Damon Knight (Lancer Books, 1963) and "First Voyages", edited by Damon Knight, Martin H. Greenberg and Joseph D. Olander (Avon Books, 1981).
 which did not include individual introductions.
 The content of "Wondrous Beginnings" has little overlap in content with these earlier anthologies, however, as only the stories by de Camp, Clement and Clarke are repeated from them.
Horrible Beginnings is an anthology of horror short stories edited by Steven H. Silver and Martin H. Greenberg, first published in paperback by DAW Books in March 2003.
 The cover art is based on Children of Bodom's debut album, "Something Wild".
 It is a compilation of the first published stories of seventeen authors in the genre, and features introductions to the stories provided (in most instances) by the authors of those stories.
 "Horrible Beginnings " was the third and last of three similarly-themed anthologies, its companions being "Wondrous Beginnings" and "Magical Beginnings", compiling the first published stories of authors writing in the science fiction and fantasy genres, respectively.
 The series follows the example of the earlier "", edited by Damon Knight (Lancer Books, 1963) and "First Voyages", edited by Damon Knight, Martin H. Greenberg and Joseph D. Olander (Avon Books, 1981), which focused on science fiction authors only and did not include individual introductions.