 A second hardcover edition was issued by Bonanza Books in 1985.The first chapter was reprinted as "One Day in the Cretaceous" in the de Camps's collection "Footprints on Sand" (, 1981).As stated on the dust cover of the Doubleday edition, the work is a survey of "the exciting story of the lost world of the great reptiles and of the fossil hunters who discovered them millions of years later."