(W) Roy Thomas, Gary Friedrich (A) John Buscema & Various (CA) John Buscema Get ready for Earth's Mightiest Heroes matched with two of comics' mightiest talents - Roy Thomas and John Buscema - as the Marvel Masterworks take you on a trip through one of the most stellar creative periods in Avengers' history! It's cover-to-cover watershed moments for the Avengers: The Black Panther joins the team, the Avengers fight the X-Men, a new Masters of Evil debuts, the story of Bucky Barnes' tragic death is told in full for the first time, the new Avengers and the original Avengers face off in a reality-bending battle - and don't forget the first appearance of Ultron! And this storied Masterwork concludes with one of the most famous stories in all of Marveldom: the Vision's debut in 'Even an Android Can Cry.' Collecting AVENGERS (1963) #51-58 and ANNUAL #2, and X-MEN (1963) #45. All Ages