For my friends overseas, shipping is more costly than hard copy books. Certainly, anyone can choose either the hard copy or PDF edition and not limited to my overseas friends.
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 able to take screenshots to print pages when needed for performing, practice, teaching, or learning.
With gratitude and best wishes, Matthew Weinman