Hell Below / The Lost Giant

Hell Below
A mad refugee from Hitler’s crumbling Reich has set up a powerful fortress in Mexico. The plan? Capture Doc Savage and bring him by submarine to the desert hideout … enlist his aid in carrying out the “New Effort” — the one that will succeed where Hitler failed!

The Lost Giant
Across the Arctic wastes, Doc Savage races deadly enemy agents on skis and in bombers — to a remote island off the Greenland coast. The quarry is a secret so great that the future of nations hinges on Doc and his crew … and their ability to stand solidly against menacing forces of evil.