Avengers vs. X-Men #[nn]

This 2012 Marvel hardcover collects the core issues of the blockbuster crossover event where Earth's Mightiest Heroes and the Children of the Atom clash over the fate of the Phoenix Force, which is heading toward Earth and the mutant Hope Summers. The conflict escalates into a full-scale war, with alliances shifting and devastating consequences for the Marvel Universe. Written by Brian Michael Bendis, Jason Aaron, and others, with art by John Romita Jr., Olivier Coipel, and more, it's a defining saga of the era.