What is the mystery centered in Jupiter's famous "Red Spot"? Two fighting Earthmen, caught by the "Pipe-men" like their vanished comrades, soon find out.
Acerca de Paul Ernst
Paul Frederick Ernst (1899–1985) was an American pulp fiction writer. He is best known as the author of the original twenty-four Avenger novels, published by Street & Smith under the house name Kenneth Robeson.