James Ensor (1860-1949), peintre belge, ne s'est jamais soucié des courants artistiques de son époque. Sa peinture expressive, souvent caractérisée par des formes fantastiques et des tonalités parfois grinçantes et agressives, ainsi que sa vision subjective ont influencé de nombreux artistes du XXe siècle. Cet ouvrage retrace son parcours original.
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.