We've certainly been selling copies of the print book, even more than I expected.
However, did you know that you're entitled to get the PDF version free with the print book?
We've only received one email with the proof of purchase of the print book that we've requested, which makes me think people aren't finding the instructions that Lulu sends when you buy the print copy of the book that tell you how to get the PDF free.
Anyway, for those who are in that situation, please just email proof of purchase to: rinarapress at gmail.com. You then will get unlimited updates to the PDF, barring a nearly complete rewrite of the book.
Having access to the PDFs is useful for having the most up to date content, so please be sure to contact us and get what you paid for. :)