With the appearance of the demonic Christmas character Krampus in contemporary Hollywood movies, television shows, advertisements, and greeting cards, medieval folklore has now been revisited in American culture. Krampus-related events and parades occur both in North America and Europe, and they are an ever-growing phenomenon.

Though the Krampus figure has once again become iconic, not much can be found about its history and meaning, thus calling for a book like Al Ridenour's The Krampus: Roots and Rebirth of the Folkloric Devil. With Krampus's wild, graphic history, Feral House has hired the awarded designer Sean Tejaratchi to take on Ridenour's book about this ever-so-curious figure.

Al Ridenour has lectured on Krampus at the Goethe Institutes in Los Angeles. He became somewhat of an internet phenomenon himself due to the hilarious hijinks he coordinated with the controversial Cacophony Societies.

His Krampus research has taken him to the Austrian Alps and Munich, and brought him in contact with cultural anthropologists working in Salzburg and Vienna as well as dozens of members of contemporary European Krampus groups. In 2013, Ridenour co-founded Krampus Los Angeles, an organization that's made the city ground zero for American Krampusmania.

Ridenour has translated and produced the only English-language version of 19th-century Krampus play, written articles, and lectured on the topic at the international Goethe-Institut and elsewhere, and exhibited his Krampus suits at the University of Southern California's Doheny Museum