"Book XVII: Man's Inhumanity!" Researched by Peter Anderson. Wraparound cover by Keith Pollard and Bob McLeod. The Official History of the Marvel Universe continues as we witness the amazing conclusion to the very first battle between the X-Men and Avengers! Plus, how did Professor X wind up in a wheelchair? Plus, the Fantastic Four face off with the Frightful Four for the very first time!

The origins of the Inhumans, Ka-Zar, and the Hulk's greatest foe - the Leader. And, Doctor Strange must contend with the combined might of Mordo and Dormammu! Featuring excerpts from Fantastic Four (1961 1st Series) #35-38, Uncanny X-Men (1963) #9-11, Tales of Suspense (1959) #60, Daredevil (1964 1st Series) #11, Strange Tales (1951-1976 1st Series) #130, and Thor (1962-1996 1st Series) #146-147, Astonishing Tales (1970) #11, Ka-Zar the Savage (1981) #15 and Tales to Astonish (1959-1968 1st Series) #63-65