No, I'm not, and never have, marketed a book on that kind of stuff. Anyway, good luck to the bloke who's doing it.
Actually, I have authored two books, but they were oral English textbooks, books 1 and 2, tailored for freshmen and sophomores in higher education in China. However, I'll need to fall back upon 'special relationship' with a head of the English department somewhere to kickstart VOLUME SALES to a captive audience, as it were. I'm presently waiting for one of my former Chinese colleagues to reach such a lofty position.