GET READY FOR A ROUGH RIDE! The World Championship Match; Carlsen - Karjakin 6:6; 3:1 By GM Sam Shankland SILVER AND GOLD By GM Andrei Volokitin MEETING FIRE WITH FIRE By GM Eric Hansen MY LONGEST EVER GAME By GM Michael Adams CARLSEN VS MORTALS IN BAKU By GM Aleksandar Colovic LATIN AMERICANS AT THE BAKU OLYMPIAD By GM Sandro Mareco THE YOUNG IRANIANS By GM Ivan Sokolov THE EVER DANGEROUS 6.Bg5 AGAINST THE NAJDORF SICILIAN By GM Rafael Leitao KING'S INDIAN WHERE 3...Nh5 IS PLAYABLE FOR BLACK! By GM Benjamin Gledura WHEN THE ENGLISH ATTACK AGAINST THE SICILIAN IS MET BY 8...h5 By GM Emanuel Berg ENDGAMES FROM THE BAKU OLYMPIAD By GM Karsten Mueller + Games, Combinations, Endings, Tournaments...
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.