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 fi ght the X-Men, an all-new Masters of Evil debuts, the first-ever full telling of Bucky Barnes' tragic death, a reality-bending batt le between the new Avengers and the original Avengers...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 debut of the Vision and "Even an Android Can Cry." COLLECTING: AVENGERS (1963) 51-58, ANNUAL (1967) 2, X-MEN (1963) 45