This book is a real support manual for the visitor seeking to enjoy the practical resources that can provide the more or less close to home. Its optical wants more practical and usable as the various manuals of "survival" (type man vs wild): it allows to locate in the middle of wild garden of the natural environment, to organize daily activities, especially finding and prepare the right plants. Before entertaining learning to "survive in a hostile environment," already simply learn to live in nature around us, this is one of the messages of Couplan.