Consumers embrace the skull: Nike, Calvin Klein, Zippo, and Crystal Head Vodka feature them as product lines. Skulls adorn artwork, sneakers, candy, skateboards, jewelry, and even wallpaper. The skull is everywhere in pop culture! Never before has a book addressed the skull as a cover motif during the Golden Age of American publishing. Countless skull-themed comic book, pulp, and paperback covers appeared from the 1930s through the mid-50s.