Ace of Space: 1944: Ace Egan, P.O.W.
by Drivtaan 
Captured by the Nazis, Lieutenant Frank “Ace” Egan is sent to Germany’s toughest stalag. When the Allied prisoners led by Colonel Hogan discover that the newest man in the barracks is really the Ace of Space, Hogan’s heroes come up with a plan to break him out of Stalag 13, even if it means shutting down their secret espionage operation. But when the mysterious double agent known as Doppelgänger becomes involved, will he or she turn out to be help or a hindrance?
Ace of Space: 1944: Prelude to a Storm
by Drivtaan, partially adapted from the Ace of Space story in Feature Comics #38 by H. Weston Taylor and Harry Campbell
After Ace Egan encounters an alien who gives him an opportunity to be a hero, he uses a powerful belt to become the nine-foot-tall Ace of Space. But when Ace takes a mission as a special agent of the U.S. Army Air Corps behind enemy lines, has the giant hero finally met his match? And what horrors might be unleashed when the secret of his mighty powers falls into the hands of the Nazis?