Given that my Guide is now in its eighth edition, you can appreciate why I've hesitated to put out a print edition -- the publishing business changes so fast! But now I have bitten the bullet, and Notjohn's Guide to E-Book Formatting is available on the Amazon store. The book includes a chapter on publishing a print edition, because I think you should do that as well. Over the past six months, I've seen my print sales increase while digital sales were stagnant or even fell, so that now they are nearly equal.
On the US store, the "Matchbook" price is zero, meaning that if you purchase the paperback, you can get the Kindle edition free. But you might want to hold that opportunity in reserve. I update the e-book once a year (and sometimes more often); that's a whole lot more difficult with print.