Kmoch is on the Archive. I also found his book on a free download through pdfcoffee dotcom. Thanks, Blue Emu. I think this is just the book that I need.
You read my warning, yes?
This book expects the student to WORK. In return, you can look forward to increasing your understanding of the game enormously, and to an eventual rating increase (after you've struggled with the text material and finally defeated it) of hundreds of points.
Step one is to learn a new language. Not kidding. Kmoch invents his own terminology for Pawn structures.
Twin. Ram. Duo. Phalanx. Chain. Lever. Leucopenia. Melanpenia. Head-duo. Base. Outpost. Lee. Luff. Frontspan. Rearspan... all of these terms have highly specific, narrowly focused meanings in Kmoch's lexicon. You'll have to learn what the words mean.
But it's worth it, because once you understand the "language", it's possible to convey an enormous amount of conceptual content in a few words... example: "Lacking a base- or head-duo, White's chain is naturally prone to leucopenia". That one sentence conveys a lot of meaning... IF you understand what concepts the individual words in the sentence stand for.
I just collected 6 of the best books ever written about chess for free.