X-Men: Age of Apocalypse Vol. 1: Alpha
Charles Xavier is dead - killed twenty years in the past during a time-travel accident - and the world created by his absence is a nightmare! Apocalypse rules with an iron fist, ruthlessly enforcing his dictum that only the strong shall survive. But hidden in the long shadow of En Sabah Nur is a group of ragtag freedom fighters led by Xavier's oldest friend, Magneto: the X-Men! When Bishop, last survivor of the true Marvel Universe, explains how the world went wrong, these embittered mutants and their tenuous allies must risk everything to put things right!
Collecting UNCANNY X-MEN (1981) #320-321, X-MEN (1991) #40-41, CABLE (1993) #20, X-MEN ALPHA, GENERATION NEXT #1, ASTONISHING X-MEN (1995) #1, GAMBIT AND THE X-TERNALS #1, WEAPON X (1995) #1, FACTOR X #1, X-MAN #1, X-CALIBRE #1, AMAZING X-MEN (1995) #1 and X-MEN: AGE OF APOCALYPSE ASHCAN EDITION.