Detective Comics
Detective Comics is an American comic book series published by DC Comics. The first volume, published from 1937 to 2011 (and later continued in 2016), is best known for introducing the superhero Batman in "Detective Comics" #27 (cover dated May 1939).
Action Comics
Action Comics is an American comic book/magazine series that introduced Superman, one of the first major superhero characters. The publisher was originally known as National Allied Publications, and later as National Comics Publications and as National Periodical Publications, before taking on its current name of DC Comics. Its original incarnation ran from 1938 to 2011 and stands as one of the longest-running comic books with consecutively numbered issues. A second volume of "Action Comics" beginning with issue #1 ran from 2011 to 2016. "Action Comics" returned to its original numbering beginning with issue #957 (Aug. 2016).