This book is useless to me! When I am facing a plant, I need a book helps me to recognize it. 4-5 questions and hop boards to refine recognition. Then I need to know if at that time of year and where I am if it is edible. After, I expect some indication of the flavors that I will find. If anyone knows this type of book, I take your advice.
Here, none of that! The scientist remained in his vision and contributes nothing to a curious walker.