I received this book earlier in the week and breezed through the content pretty quickly in a couple of evenings. Let me just say that I've been voraciously reading all the motorcycle technique books I can get my hands on including both of David Hough's books and Lee Parks' Total Control.
Ken spends over half the pages of Riding in the Zone on very basic concepts that are already well covered in every other text, including the Motorcycle Safety Foundation (MSF) workbook. This was the biggest disappointment to me as the subtitle of the book is "advanced techniques for skillful motorcycling." The second half of the book covers some intermediate topics that are generally covered well in existing books. When getting to the advanced topics, such as suspension setup, Ken simply refers you to other texts.
So why did I give this four stars despite being disappointed with the book? Well, the book has two great things going for it. First, unlike the David Hough books, Ken provides clear exercises for practicing the techniques. That's something I haven't found elsewhere and was the real reason I was excited to get this book. The second and most important reason is that the book comes with a well produced, clear, and relevant DVD that covers the topics. In fact your time would be better spent simply watching the video and practicing the exercises.
In summary, this book should really be subtitled "Basic and Intermediate Techniques." Without the high quality DVD I would give this title three stars. If you're looking for one book that really does cover advanced techniques I'd highly recommend Lee Parks' Total Control. People happiest with this book are likely to be those that just completed the MSF course or those that have never taken it.
* Clearly described exercises for learning the techniques
* Very well produced video that covers the key information and exercises from the book
* Deceptive subtitle. This is not a book of advanced techniques. For that read Lee Parks' Total Control
* Lack of depth on many topics
* Most of the book focused on basic information already available through beginner books, including the MSF workbook