VENUS Interplanetary hunters Tommy Strike and Gerry Carlyle stalk the monstrous Whip, suffer under the onslaughts of the Whiz-Bang Beetles and track the huge Shovel-Mouth. JUPITER On the fifth Jovian satellite, Quade and Carlyle pit themselves against the fire-breathing Cacus. THE GAS GIANTS The hunters meet the Shaggies, the Goras and the amazing, tunnel-boring Rotary Mole. ALMUSSEN'S COMET Battling against the fierce three-headed Hyclops and the intelligent, extra-Solarian Protean.