Contents: • Out of the Dreadful Depths • short story by Charles Willard Diffin [as by C. D. Willard] • Murder Madness (Part 2 of 4) • serial by Murray Leinster • The Cavern World • short story by James P. Olsen • Brigands of the Moon (Part 4 of 4) • [Gregg Haljan • 1] • serial by Ray Cummings • Giants of the Ray • novelette by Tom Curry • The Moon Master • novella by Charles Willard Diffin [as by Charles W. Diffin]