Atlantis: The Antedeiluvian World discusses many facets of Atlantis: The history; The Deluge; Civilization of the Old World and New Compared; Mythologies of the Old World; and The Colonies of Atlantis. The text includes lots of illustrations. This is the believed story of an ancient colony by the name of Atlantis. The first purpose of the book states: "That there once existed in the Atlantic Ocean, opposite the mouth of the Mediterranean Sea, a large island, which was the remnant of an Atlantic continent, and known to the ancient world as Atlantis." It further states: "That Atlantis was the region where man first rose from a state of barbarism to civilization."