Rating: 4 Stars
First and foremost, any digging at this point to find Arthur will only result in conjecture. It's been too long and any evidence is almost certainly long gone. However, the author is convincing in that I'm now quite sure an Arthur did exist. Not as we think of Arthur in mythology now, the Once and Future King who will some day awaken and reclaim his throne, but a living, breathing warrior king who united his people (as best he could) against the invaders.
I found this a rather easy read and enjoyed it. I also enjoyed that the author didn't aim for one theory, ignore others, and make the evidence fit what he thinks. He explored several options, while naturally indicating which one makes the most sense to him. Nicely done.