Ultimate Marvel Team-Up #6

The cover of this 2001 team-up says everything you need to know about the tension inside: the Punisher fills the frame, aiming a massive gun directly at the viewer, while Spider-Man's masked face is reflected ominously in the weapon's scope — caught in the crosshairs of a very different kind of hero. Bill Sienkiewicz's cover art is rendered in a stark, moody palette that makes the red laser sight and Spider-Man's reflection pop with real menace. Brian Michael Bendis and Sienkiewicz together make this pairing of Marvel's most unlikely allies feel genuinely dangerous.