Amazon.com description: Product Description: There are certain unwritten rules that apply to the Avengers:

1. The Earth's Mightiest Heroes are a united and unbeatable Unit.
2. No intelligent foe would launch a direct assault on their Mansion
3. Jarvis, the team's butler, is off limits to physical assault.

But Baron Zemo, master strategist and leader of the Masters of Evil, has no use for the restraints of society.  Preying upon their emotional differences, he will divide and conquer the globe's premiere super-team.  Outsmarting their high-tech defense system, he will kick down their front door,.  Harnessing the power of the world's most vicious villains, he will stop at nothing to taste victory...including beating a helpless butler.

This is the story that breaks all the rules.  You've been warned.

Collecting the story originally appearing in Avengers #270-271 and #273-277 -- written by Roger Stern and illustrated by John Buscema and Tom Palmer.