World's Finest Comics 1941 #222 - back issue - $15.00

The super-sons accompany two scientists with opposing views on the essential nature of man - good or evil - to a newly discovered civilization between South America and Antarctica. But when the experiment doesn't go the way one scientist expects, he interferes in it with deadly results.

On-sale date from Comic Reader #102.

• Evil in Paradise - Superman Junior and Batman Junior. Batman's wife appears in the story, but her identity is not made clear. Feature bannered as "Superman Junior and Batman Junior" on splash page. The story also has two separate chapter titles: Part 2 - The Human Test Tube; Part 3 - Who the Killer, Who the Prey?