1st appearance of The Monk, Batman's first costumed enemy
1st appearance of Julie Madison, Bruce Wayne's girlfriend
5th appearance of Batman
Debut of the Batgyro, an airborn vehicle later replaced by the Batplane
Debut of the Batarang
Stories take place in New York City
Issue Details
| Publisher | DC |
| Artist | Bob Kane |
| Writer | Gardner Fox |
| Published | September 1939 |