"The Red Hell of Jupiter' by Paul Ernst (Kindle Edition) - Preview Available

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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.

Paul Frederick Ernst (November 7, 1899 – September 21, 1985)[1] was an American pulp fiction writer. He is best known as the author of the original 24 "Avenger" novels, published by Street & Smith under the house name Kenneth Robeson.