July 1931
- THE DOOM FROM PLANET 4 / JACK WILLIAMSON
- THE HANDS OF ATEN / H. G. WINTER
- THE DIAMOND THUNDERBOLT / H. THOMPSON RICH
- THE SLAVE SHIP FROM SPACE / A. R. HOLMES
- THE REVOLT OF THE MACHINES / NAT SCHACHNER AND ARTHUR L. ZAGAT
- THE EXILE OF TIME / RAY CUMMINGS
