Greg Leitich Smith is the author of NINJAS, PIRANHAS, AND GALILEO (Little, Brown 2003 hc, 2005 sc), and its companion book, TOFU AND T.REX (Little, Brown 2005). He and his wife, Cynthia Leitich Smith, are the co-authors of the picture book, SANTA KNOWS (Dutton 2006), illustrated by Steve Bjorkman.