If you enjoy reading a book where the author's company's core technique is repeated in CAPITAL LETTERS two or three times every page, then this book is for you.
The book does contain some useful information, but it's infuriating to read; almost every page has the phrase GROW BIOINTENSIVE multiple times in all caps. The copy editing is sub par; there are many misspellings - GROW BIOINTENSIVE is even spelled incorrectly on at least one occasion. Aside from the numerous references to GROW BIOINTENSIVE, the author frequently refers to his company, and his other publications; for example: "Calorie and sustainable soil fertility min-farming and gardening is the next step, which needs to be catalyzed by each one of us. Ecology Action publications Once Circle, The Sustainable Vegetable Garden, and the Self-Teaching Mini-Series Booklets, 14, 15, 25, 26, 28, 34, 35 and 36 deal with growing a complete diet."
To add insult to injury, the book is written as if to a reader with ADHD. Frequently a paragraph will rehash the same information that was in the previous paragraph. There are entire half pages of fluff.
Author(s), if you are reading this, please remove ALL mentions of GROW BIOINTENSIVE (except in a prologue or epilogue); please remove all references to other Ecology Action publications (except, perhaps in footnotes); and tighten up the text (you can lose easily 50 pages).
In summary, I recommend against buying this book. There are better books focused on the techniques covered here, without attempting to give you the hard sell.