76 pages of Mutant Mayhem! Four uncanny stories!
The Beast is searching for a way to return the X-Men to their own time – could Doctor Strange be the answer? By Dennis Hopeless and Paco Diaz!
Magneto's X-Men battle the Dark Riders as mutant healers are marked for murder! By Cullen Bunn and Greg Land!
Storm's X-team enters the strange dimension called Weirdworld! By Jeff Lemire and Victor Ibanez!
Classic 1960s action! The original X-Men encounter the Frankenstein Monster! By Roy Thomas and Don Heck!
Featuring material first printed in Uncanny X-Men #3, All-New X-Men #8, Extraordinary X-Men #6 and X-Men #40.
— Description from Comic Vine community (comicvine.gamespot.com).