Despite not being very interested in either chess or the martial arts, this is one of the most interesting and insightful books I have read. Josh is one of the few people that has become an expert at something and maintained the ability to understand and share exactly the process that led him to expertise, then abstract the process to make it applicable to learning almost anything. His writing style is clear and engaging. He's a great teacher--he subtly reviews as he goes along without making the book seem repetitive. The concepts are simple and powerful. Already I've been able to apply them to endeavors in my own live and I've seen results.