I do not understand the readers who speak nonsense. All boards 'practices' of this book are superbly documented. It's not wacky inventions of the author. Habitat construction, recognition of flora and fauna, clothing fabrics, recognition soil, orientation, etc. All this is difficult to refute and relies on more than tangibles. I can understand that some people are bothered by "ideology" of the book, but would remove remove his soul. No work can claim to show a limitless objectivity, and of 'Manual of wildlife, "the ideas of the author (which take around thirty pages of a book of nearly 500!) Does are dangerous or absurd anything, quite the contrary. Deliver an ode to nature in an era of industrialization is like a peaceful anarchism, a sweet utopia in any way to any sectarian abuse. Nevertheless, it is for me one of the best books I've read, because rewarding not just for the realization of a life "marginal". As such, emergency medical advice or "DIY" (among others) are universal! More than a manual Robinson Swiss, this book is a mine of knowledge and deserves its reputation. Essential for all inquiring minds!