Hengeyokai is an expansion to Werewolf the apocalypse. Hengeyokai is two books in one, first on the ways and culture of the eastern changing breeds. (werewolves, wereravens, weresharks, weredragons, wererats, weretigers, werespiders, and weresnakes) along with new merits, flaws, gifts, auspices (oriental auspices - leaf, steel, lantern, etc..) along with how to combine a western based game into an eastern campaign... or the other way around. The second half of the book is all about the Kitsune, or werefoxes. The mystery makers of gaia. They do not cause the delerium, they have nine tails, and their gifts of paper folding are unique to them. The reason that the two books are combined in one is simple: you can play a Hengeyokai without knowing anything about Kitsune, but you can't play a Kitsune without knowing about Hengeyokai! Two books in one is an excelent deal and a wonderful suprise to those who don't know.