52 is a weekly American comic book limited series published by DC Comics that debuted on May 10, 2006, one week after the conclusion of the Infinite Crisis miniseries. The series was written by Geoff Johns, Grant Morrison, Greg Rucka, and Mark Waid, with layouts by Keith Giffen. 52 also led into a few limited series spin-offs.

"Infinite Crisis" is a 2005–2006 comic book storyline published by DC Comics, consisting of an eponymous, seven-issue comic book limited series written by Geoff Johns and illustrated by Phil Jimenez, George Pérez, Ivan Reis, and Jerry Ordway, and a number of tie-in books. The main miniseries debuted in October 2005, and each issue was released with two variant covers: one by Pérez and one by Jim Lee and Sandra Hope.