Another three years of the “Zen” comic strip, with an intro by Bill Griffith.It’s three more full years of Ernie Bushmiller’s beloved comic strip, featuring over one thousand meticulously restored daily strips from its post-World-War II graphic high point — superbly crafted but not yet quite stylized into the almost machine-life sleekness of later decades. And what can you say about the jokes in Nancy other than that, contrary to its reputation for a zen-like, ultra-square oddness, many of them are actually just extremely funny? Nancy Likes Christmas is topped off with a new introduction in comics form by Zippy the Pinhead creator Bill Griffith, a lifelong fan of Nancy and admirer of Bushmiller’s genius, and once again designed with pop-art snap and crackle by Fantagraphics senior designer Jacob Covey. Yes