All the world — indeed, the galaxy! — knows of Tom Corbett: Space Cadet and his heroic deeds across the heavens. Aboard the Polaris, a sturdy spaceship, his loyal, intrepid crew is ready to face danger and maintain the peaceful status quo of the universe — for all mankind! Tom Corbett's secret mission leads to unknown danger light years from Earth in ''Mystery Mission to Kepler 186f'' by R. Allen Leider. ''Ask Not for Whom the Planet Tolls'' by Patrick Thomas, an expedition from Earth discovers treachery and rebellion on — The Rogue Planet. Earth's fate hangs in the balance; A child's nightmares warn of a deadly future in ''A Voice in the Dark'' by Sandra Lee Rauenzahn; and Agent Archer blasts off for action When the Insectoids stalk hapless space travelers in ''Rogue Planet'' by DJ Tyrer.