The barren crust of Mercury lay covered by a network of wire designed to harness the dazzling blaze of the sun and send it sizzling through hyperspace. But someone, or something, on tha airless world was sabotaging the top secret mission. Where no life was said to exist, impossible “ghosts” had been seen, and murderous snakes of alien rock had condemned the innocent to death. It is to this troubled planet that Lucky Starr is sent by the powerful Council of Science. Who or where the enemy is…no one knows. And in order to find out, Starr must face the most deadly—and insane—opponent of his young career!