Its OK but more of a collection of available information from various internet sites rather than the authors own actual research notes.
Some of the pictures are mislabelled with incorrect names of the persons pictured and if the researcher had doubled checked some of the info, numerous bits are outdated as new info has become available.
Again, could have done with a wider reference to the various influential Shorin Ryu / Shuri Te styles rather than a chosen few.
What was disappointing is that Tomarite was linked into this book, the author could have separated this and produced antoher book on this alone with the amount of available information out there.
A good effort though and useful for those starting out in their research into Okinawan Karate, not so useful for those already learned in Okinawan Karate History.