At first, I was put off about reading this book since I don't believe we'll ever know with any confidence that a historical Arthurian figure ever existed, much less where his tomb is.
Then, when I started actually reading, I was further reticent to continue reading since the author introduced the subject with the typical load of b------s authors say when they want to reel you in. You know, the clichéd, I have made unbelievable discoveries, but I'll only tell you about my findings at the end of the book. Bleh.
But I hadn't decided yet what to read next, so I kept reading. I did end up learning some new interesting little facts and details about the origins of certain elements in the Arthurian legend.
The author has a palpable excitement about the Arthurian legend, and he has done a lot of research on the topic. However, I found that he is very much committed to finding definitive answers, and so he oversimplifies and leaps to hasty conclusions all the time. In the end, he puts forward another possible historical figure that might have inspired Arthurian legend, which didn't manage to convince me. It's worth a read to see another perspective but don't put too many expectations on the fruits of his investigations.