If you don't mind me asking, is there a POD block printed on the bottom of the last blank page? Typically it's a barcode and something like "Printed in USA, Lexington KY" and the date.
Also on the Twitter thread someone mentioned that the contents were copied from a PDF you sell on the site -- are they the same press-ready PDFs used for the book, or PDFs formatted for 8.5 x 11? I ask because we sell PDFs too for letter-sized paper, and I always assumed it would be difficult to pirate for a 6x9 how-to guide.