Wolcott's already had his fun with it, but I really really really hope that's an actual shot of the cover.
Because there's nothing -- that's nothing -- funnier in the graphic-design biz than getting a full shipment of books back from the printer, opening the box with trembling anticipation, and only then seeing the howling typo in the book's subtitle.
(It's published-on-demand, so the cover's probably a PDF file that can be instantly corrected. In the spirit of Historical Accuracy, though, I'll just grab the live version and reproduce below. Let the Schadenfreude begin!)