The Mad Monster of Mogo

From Internet Archive, formatted, proofed, v1.5.

"No armament, however deadly, could stop this walking mountain. No force of manpower could stand before him. So the weapons of a world’s survival seemed to be brains, boxcars, and bread." And chocolate, don't forget the chocolate.

Had to describe this story, it's so bad that it's good. Cover: that's not the monster, it's Green Flash rescuing Anna (the monster wouldn't know a woman from a jelly bean). Oh, and the square-cube scaling law has been suspended for the duration.