I blasted through this book in a few days, and I'm planning to follow the 8-week plan and drills for making the transition to a "natural running" style. Given that I'm on board with Danny Abshire's recommendations, why only 3-star rating? Two flaws.
First, the author makes too many references to his shoe company. Even though I believe he's sincere in recommending a certain type of footwear based on peer-reviewed scientific literature and his own experience, I couldn't help but think of the book as an advertisement for his brand of shoes.
Second, there is too much detail in the first 8 chapters, and too little in the concluding 2 chapters. Many points are stated over and over and over and over and... you get the idea. He didn't need 8 chapters to describe the problems associated with heel-strike running and the benefits of switching to natural running. I think he could have stated the case much more succinctly. At the same time, it's hard to figure out how to do some of the exercises from the text and pictures -- the training section could benefit from more detailed explanations.
Depending on the results I achieve by following the program, I may change this rating. After all, if a book can improve my physical health, I'd be convinced to give it 5 stars regardless of writing flaws. From one author to another, I'm thankful that Abshire undertook the effort to put his knowledge to paper.