According to Sterling Publishing, the publisher of this book, the book is sold out and there are no plans to reprint more copies. You can always contact the publisher at firstname.lastname@example.org to help change their mind.
From: United States
Hi Dave! Thank you for the information. I am sad to learn that there are no plans to reprint this book. I did as you suggested and sent an email, and hopefully other puzzlers who read this thread will maybe send one as well. Thanks again!