IT CAME FROM THE SEA--huge, hairy, glowing, terrifying. On the beach, people gathered to stare-from a distance-at a creature unlike any they had ever seen.David, a young scientist, and his girlfriend, Joan, were among them. But David was not content with a distant look. At sundown, when the crowd had gone, David and Joan returned.And that's when it happened.A blinding light was all they remembered. Suddenly David and Joan were plunged through time into a world of towering glaciers and prehistoric beings-into an adventure of cataclysmic terror from which there seemed no escape!