The PDF editions are Copywrite, copy-protected. There is a code of ethics (especially as we are honest good-hearted musicians) that I am counting on that the buyer will not share this or any forthcoming PDF editions of Turtels & Twins Press books via email.
You are allowed to take screenshots to print pages when needed for performing, practice, teaching, or learning.
I realize that for my friends overseas, the shipping is more costly than the hard copy books. Certainly, anyone can choose either the hard copy or PDF edition and not limited to my overseas friends.
With gratitude and best wishes, Matthew Weinman