Fan-favorite creators Kurt Busiek and George Pérez usher in a new era for Earth's Mightiest Heroes! Since the team's inception, the Avengers have always defended humanity against the forces of evil. When duty calls, these legendary champions answer, fighting valiantly until justice prevails. But what happens when their oldest foes strike directly at the team? On the eve of a huge Avengers gathering, an attack by the evil enchantress Morgan Le Fay sends these assembled heroes into a strange medieval reality where nothing is as it seems. Held under Le Fay's thrall, the Avengers have lost all memory of their true identities. Breaking free of Morgan's spell, Captain America and Hawkeye must fight to free their teammates before the Marvel Universe is altered forever! Plus: The Avengers take on the Squadron Supreme! Collects Avengers (1998) #1-11.

AVENGER VS. AVENGER! Thanos has been defeated, but the Avengers' biggest challenge may come from within their own ranks! Captain America makes a discovery that may tear the team apart! And: Witness the origin of one of the Avengers' greatest villains! COLLECTING: MARVEL UNIVERSE AVENGERS ASSEMBLE: CIVIL WAR #1-4.

A brand-new, prose retelling of the history of Earth's Mightiest Heroes--as told by the team members themselves! Written by Avengers and New Avengers scribe Brian Michael Bendis--and featuring illustrations by all-time great Avengers artists including Jack Kirby, Neal Adams, John Buscema and more.

THE DARK REIGN IS HERE! Who are the Dark Avengers? Who is the Iron Patriot? The answers will shock you! From the fan-favorite creative team of Brian Michael Bendis and Mike Deodato Jr. Collects Dark Avengers (2009) #1-6.

Captain America, Iron Man, Thor, and a large gathering of Avengers battle evil sorceress Morgan Le Fay in a strange medieval reality.

Collects Avengers Assemble #1-8. A perfect jumping-on point, featuring the cast of the summer blockbuster - but in Marvel Universe continuity! But who is behind the villianous Zodiac's return? None other than Thanos, the mad Titan, who has claimed Earth as his own! The Avengers team up with cosmic blockbusters the Guardians of the Galaxy to bring Thanos some cosmically-charged pain!

The European country of Slorenia is dead. Every man, woman, and child eliminated with the cold precision of a machine. And out of the flaming remnants of this tiny Baltic state comes a message from its murderer: Mankind's days are numbered because Ultron has returned! He - or it - is one of the Avengers' oldest, most implacable foes, menacing humanity countless times. But never before has Ultron been this dangerous, this deadly. Now, he stands on the brink of committing global genocide, and rebuilding Earth in his own robotic images. Our only hope is a desperate U.N. strike on Slorenia, led by the Avengers themselves. But will it be in time? Will the strength and courage of Earth's Mightiest Heroes be enough in the face of such overwhelming evil? For the sake of the world, it will have to be! Plus: When you're an Avenger, you're one of Earth's Mightiest Heroes - the first line of defense against the dangers no conventional foe could halt, the threats no ordinary man could withstand. Threats including Dominex, Lord Templar, Pagan, and the Thunderbolts! Collects Avengers #12-22, #0 and Annual 1999.