Part historian, and part teacher, Zavier is the author of two books, Logo, Font & Lettering Bible and Learn FontLab Fast, that have inspired designers to create better quality logos and fonts with properly drawn letterforms. This fascination with letterforms led to Zavier's font BadTyp. He spent years collecting the worst examples of lettering and created this font to teach people to recognize the most common lettering mistakes. “There is only one basic error in font design, and that’s inconsistency,” Zavier said. “Another of my fonts, Saber, utilizes some letterforms that may even be unique in the history of lettering–at least I think so.”