Halo Uprising is a 4-issue comic book series published by Marvel Comics. The comic fills the gap between Halo 2 and Halo 3, explaining how John-117 got to Earth. The series was first announced at the NY Comic-Con 2007. Originally intended to be finished for the release of Halo 3 in September 2007, all issues of Halo: Uprising experienced severe delays before being released. A hardcover edition went on sale on June 5, 2009.