Taking off from Aylesworth's roundup of terrestrial Movie Monsters (1975), Simon surveys spooky spacelings from The War of the Worlds to TV serials, with equal time for sci-fi pulp stories and movies about invaders from or journeys into space. Simon summarizes plots, recommends a few ""must sees,"" notes which ones have good special effects (though he doesn't describe them), and fills in with photos of Astounding covers or movie stills. A quickie.