If you have received a printed copy of the book and you would like extras; Or should you like to pass the book on, particularly to younger people; Or if you simply want a copy to utilize as a reference and thus mark it up, you can download it and print it off for free. It is copyrighted, but there is no charge to you for the copy(ies) you may wish to share. To get your copy go to:
https://e-sinclair.com/book/GWSinclair-book.pdf
tnx,
g.w.