Embark on a journey, where most people do not dare to go. To hell. Join six filmmakers in their search for hell around the globe. Read behind-the scenes stories revealing personal, often unexpected, or even unexplainable experiences and events from film sets in "hellish" destinations. Visit wild northern Norway, place of the alleged entrance to hell in Russia and American theme-park-like town called Hell. Step inside a house representing a morbid vision of the Buddhist underworld in Japan and walk around a deadly sulfur lake in Indonesia. See dark, urban Congo through the eyes of children accused of witchcraft. Hell exists. It’s just not what you think it is. The film "Searching for Hell" screened at numerous international film festivals and was the world’s first feature-length documentary exhibited and distributed in virtual reality cinema.
Various is the correct author for any book with multiple unknown authors, and is acceptable for books with multiple known authors, especially if not all are known or the list is very long (over 50).
If an editor is known, however, Various is not necessary. List the name of the editor as the primary author (with role "editor"). Contributing authors' names follow it.
Note: WorldCat is an excellent resource for finding author information and contents of anthologies.