Dans le désert d'Égypte, Alphonse et Mina rencontrent l'âme errante d'une momie. Celle-ci, par ses étranges bavardages, réussit à envoûter Alphonse. Pour obéir à tous ses caprices, le garçon encourt de grands périls. Mina arrivera-t-elle à délivrer son frère de cet enchantement ?
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.