Note: Written for grades 4 through 7. "Lost worlds" both real and imaginary are explored and illustrated. Library of Congress provides a list of Contents, 24 from "The Garden of Eden" to "Hallow Earth". That contents list may be incomplete for it does not include the first of four that are named in the Summary: "Presents illustrations of lost worlds defined in histories, myths, legends and folklore, including such places as Aratta, Atlantis, Camelot, and Ultima Thule."