What brought me the book: another way to see the ground and consider gardening, with a solid and coherent arguments and a clear knowledge of the ecosystem. In my opinion however two flaws: too many moral, the book is a standing indictment against current practices. Although I am in agreement with this view, no need to remind him constantly, it affects the understanding of an innovative concept. Not enough concrete examples there, but for my part I was looking for concrete cases that morals. A rewarding book anyway.