It's an excellent and informative read, one written with an athlete in mind. Easy to understand and follow, in plain English and not full of jargon and with the requirement of a PhD to comprehend.
Sound reasoning behind the explanations and diagrams to back up the text. Author is a runner who has practiced what he speaks, and this comes through very clearly in the book.
No matter what your running level is at, or your ability, this book represent top value. The runner and/or coach will benefit heaps from purchasing this first class book, and they will be referencing it from their library many times in the months and years ahead.