76 pages of Mutant Mayhem! Three uncanny tales!
At last the dark truth can be revealed: what happened between Cyclops and the Inhumans that led to disaster for the X-Men? Find out in ‘Death of X’ By Jeff Lemire, Charles Soule and Aaron Kuder!
Magneto discovers the power behind the new breed of weaponized mutants! By Cullen Bunn and Greg Land!
The Original X-Men battle demons in Miami! By Dennis Hopeless and Mark Bagley!
Featuring material first printed in Death of X #1, Uncanny X-Men #13-14 and All-New X-Men #16.
— Description from Comic Vine community (comicvine.gamespot.com).