~Detective Comics #27 (May 1939) featured the first appearance of Batman (as "The Bat-Man"). That superhero would eventually become the star of the title, the cover logo of which is often written as "Detective Comics featuring Batman". Because of its significance, issue #27 is widely considered one of the most valuable comic books in existence, with one copy selling for $1,075,000 in a February 2010 auction. Issue #38 (April 1940) introduced Batman's sidekick Robin (billed as "The Sensational Character Find of 1940" on the cover). Robin's appearance and the subsequent increase in sales of the book soon led to the trend of superheroes and young sidekicks that characterize the era fans and historians call the Golden Age of Comic Books.~ |