Comic Book #18 -- November 23, 2012

After debuting in Detective Comics #27 in 1939, Batman shared his time with another book, under his own name.  He went on to appear in many other books. Robin the Boy Wonder, the subject of much mockery, made his debut in Batman Number 1 in April 1940. 

The image is from the wonderful site CoverBrowser (http://www.coverbrowser.com/)