The live link to the book on Amazon (only paperback available until the ebook is processed):
https://www.amazon.com/dp/B097XGM71P?ref_=pe_3052080_397514860
The third volume of essays, "Buddhist Ethics, Buddhist Practice," is being edited now, and should be up in a week or so, after which I will start doing other worldly things that are required more than editing the fourth book.