Astounding Stories of Super-Science, June, 1930
OUT OF THE DREADFUL DEPTHS by C. D. WILLARD
Robert Thorpe Seeks Out the Nameless Horror That Is Sucking All Human Life Out of Ships in the South Pacific.
MURDER MADNESS by MURRAY LEINSTER
Bell, of the Secret "Trade," Strikes into the South American Jungle to Find the Hidden Stronghold of the Master--the Unknown Monster Whose Diabolical Poison Swiftly and Surely Is Enslaving the Whole Continent. (Part Two of a Continued Novel.)
THE CAVERN WORLD by JAMES P. OLSEN
A Great Oil Field Had Gone Dry--and Asher, Trapped Far under the Earth Among the Revolting Petrolia, Learns Why.
BRIGANDS OF THE MOON by RAY CUMMINGS
The Besieged Earth-men Wage Grim, Ultra-scientific War with Martian Bandits in a Last Great Struggle for Their Radium-ore--and Their Lives. (Conclusion.)
GIANTS OF THE RAY by TOM CURRY
Madly the Three Raced for their Lives up the Shaft of the Radium Mine, for Behind Them Poured a Stream of Hideous Monsters--Giants of the Ray!
THE MOON MASTER by CHARLES W. DIFFIN
Through Infinite Deeps of Space Jerry Foster Hurtles to the Moon--Only to be Trapped by a Barbaric Race and Offered as a Living Sacrifice to Oong, their Loathsome, Hypnotic God. (A Complete Novel.)