JLA Classified: New Maps of Hell Book

"Boys, just relax and center yourselves. We all did some epic work today." -- Wonder Woman

Not an epic storyline (or volume), but New Maps of Hell works well for presenting the core League members engaged in a teamwork-oriented adventure. It has a strong start - scenes of bantering reporters / lovers Clark Kent and Lois Lane investigating several mysterious deaths - and then the JLA quickly assembles and performs the 'hero walk' right up the White House lawn to question the POTUS. (Since the prez is Lex Luthor, he has inside knowledge of the book's actual villain du jour.) The heroes are put through individual trials by the mysterious threat affecting the planet, and when they are reunited Wonder Woman has a nice 'you suck' speech before the beatdown commences.