The impact of American underground comix is profound: They galvanized artists both domestically and abroad; they forever changed the economics of comic book publishing; and they influenced generations of cartoonists, including their predecessors. While the works of Robert Crumb and Art Spiegelman are well-known via the New Yorker , Maus , and retrospective collections, the art of their contemporaries such as Gilbert Shelton, Trina Robbins, Justin...