This book features the works of some of the most creative and talented Canadian students in grades six through eight. The short stories contained herein are representations of what our youngest generation is hoping, dreaming, thinking, observing, and fearing. They communicate them to us with vibrant sincere language using humour, sadness, wit, and originality.
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.