Goran Powell's done a wonderful job of writing up the story of the real Mr Miyagi. As someone who has practised karate (albeit a different style), I found his descriptions of Karate to be spot on, and his descriptions of life in Japan in the 40s ring true, based on other materials I've read.
The pace of the book is also very good- the chapters have a good flow to them, and the breaks are at very convenient spots, ideal for reading when you're likely to be interrupted. I found the story gripping too, as I ended up reading past my allotted reading time regularly.
The book is not full of fight sequences, but has some action nonetheless, and the portion of the story which falls into the American invasion of Okinawa does a brilliant job of describing this from the Japanese side. The story is more about the spiritual growth that comes with studying a martial art, and the attitude it encourages.
I would heartily recommend this book to anyone who has an interest in martial arts and philosophy, and will be looking at Goran's other writings.
Note that I'm deliberately keeping this review a little vague because I don't want to introduce spoilers, but, as it's semi-biographical book anyway, there aren't many surprises.
The book was a review copy via Goodreads First Reads.