1st printing. Collects Uncanny X-Men (1963-2011) #298-300, 303-304, and 315, X-Factor (1986-1998 1st Series) #92, X-Men Unlimited (1993-2003 1st Series) #2; X-Force (1991-2002 1st Series) #25; X-Men (1991-2008 1st Series) #25, Wolverine (1988-2003 1st Series) #75, and Excalibur (1988-1998 1st Series) #71.

Written by Scott Lobdell, Joe Quesada, J.M. DeMatteis, Fabian Nicieza and Larry Hama. Art by Brandon Peterson, John Romita, Jr., Richard Bennett, Jae Lee, Chris Sprouse, Paul Smith, Roger Cruz, Joe Quesada, Jan Duursema, Greg Capullo, Andy Kubert, Adam Kubert, Ken Lashley, Darick Robertson, Matthew Ryan, Al Milgrom, Dan Panosian, Dan Green, Terry Austin, Tom Palmer, Keith Williams, Joe Rubinstein, Bud Larosa, Hilary Barta, Jimmy Palmiotti, Bob Wiacek, Scott Hanna, Kevin Conrad, Mark Farmer, Mark Pennington, Cam Smith, Randy Elliott, Randy Emberlin and Mark Nelson. Cover by John Romita, Jr.

The thrilling saga that commemorated the X-Men's 30th anniversary! As Magneto's Acolytes amp up their attacks on Homo sapiens everywhere, the X-teams join forces to put an end to the villainous zealots' mad crusade against humanity once and for all. But has their leader, messianic madman Magneto, returned from the dead? And as a mysterious disease begins creeping through the mutant community, claiming the lives of hated foe and dear friend alike, which X-Man will buckle under the strain? Matters come to a head in the most shocking way possible, culminating in a devastating attack on Wolverine - and a showdown between Professor X and Magneto that must be seen to be believed!

Hardcover, 832 pages, full color.