(From the publisher):
from the publisher
A ball of fire streaks across the heavens leaving death and ruin in its wake - A machine of terror which cannot be halted - An amazing intelligence capable of rendering an entire continent barren... All America trembles as Doc Savage grapples with the most awesome challenge of his astonishing career!
First published in Doc Savage Magzine # 27 May 1935 - written by Lester Dent.
Original title: The Secret in the Sky
Genre: Fiction→ Adventure→ Male-Action/Adventure