Explore the amazing underwater world of the Arabian Peninsula with this essential guide to diving in the region. Covering over 60 dive sites and snorkelling areas with detailed site maps and GPS coordinates, plus a comprehensive directory of contacts, this guide will be your new best dive buddy.
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.