This volume includes classic stories from Astounding Magazine July 1930 and August 1930, many with a Mars theme.

The stories are by Capt. S. P. Meek, Arthur J. Burks, Tom Curry, Harl Vincent, Sewell Peaslee Wright, Charles W. Diffin, Murray Leinster, R. F. Starzl, Victor Rousseau, Edmond Hamilton, and H. Thompson Rich.