Detective Comics 639 (1937 1st Series)

“The Idiot!” Part 2 of 4. Story by Peter Milligan. Art by Jim Aparo and Mike DeCarlo. Cover by Norm Breyfogle. Story continued from Batman (1940) #472, and continues in Batman (1940) #473. Batman travels to an abandoned temple in the heart of the Amazon to confront the Idiot, the master of unreality. Plus: 16-page Sonic the Hedgehog insert advertisement comic with story and art by Francis Mao.