Harley Quinn Invades Comic-Con International: San Diego #1

Harley Quinn descends on San Diego's Comic-Con in this 2014 one-shot from writers Amanda Conner and Palmiotti, and the cover — penciled and inked by Conner herself — captures the chaos perfectly: Harley wields her oversized mallet center-stage, surrounded by a jubilant crowd that includes cosplayers dressed as the Joker, Robin, Superman, and Batgirl, all crammed together on what looks like a convention floor. It's a love letter to comics fandom, packed with visual gags (Shark Repellant, anyone?) and assembled by a remarkable roster of artists that includes Paul Pope, Damion Scott, Dave Johnson, and several more.