Civil War
by Mark Millar and Steve McNiven
This was one of those Marvel events where they promised “Everything would change” - but this time they actually delivered. Captain America dealt with the ramifications of this comic for nearly a decade. This comic became the blueprint for Phase 2 at the Marvel Cinematic Universe. Plus Steve McNiven is an amazing artist to see work on interior pages. He's gotten to the point where he makes more money drawing covers, so you might never see his interior pencils again. Just another reason to pick up this modern classic.