Superman: War of the Supermen is an American comic book limited series from DC Comics that serves as the culmination to the Superman line-wide event New Krypton. The series began on Free Comic Book Day 2010, with a zero-issue released free of charge before the main limited series began the following week. The whole event is portrayed as a "100 Minute War" in the narrative's time, although the whole event lasted one month in May 2010. No other Superman family books were solicited that month other than Superman/Batman and Adventure Comics neither of which crosses over into the War of the Supermen. Source: Wikipedia (en)