JLA was a comic book ongoing series featuring the Justice League published by DC Comics from January 1997 to April 2006.
The low sales of the various Justice League spinoff books by the mid-1990s prompted DC to revamp the League as a single team (all the various branch teams were disbanded) on a single title. A Justice League of America formed in the September 1996 limited series Justice League: A Midsummer's Nightmare by Mark Waid and Fabian Nicieza. In 1997, DC Comics launched a new Justice League series titled JLA, written by Grant Morrison with art by Howard Porter and inker John Dell. Morrison stayed as writer for the series until issue #41, though several issues had fill-in writers. JLA #18-#21 and #33 were written by Mark Waid. Mark Millar, Devin Grayson and Mark Waid, and J.M. DeMatteis wrote issues #27, #32 and #35 respectively.
This series, in an attempt at a "back-to-basics" approach, used as its core the team's original and most famous seven members (or their successors): Superman, Batman, Wonder Woman, Aquaman, the Flash, Green Lantern, and Martian Manhunter. Additionally, the team received a new headquarters, the Watchtower, based on the Moon. Morrison introduced the...