When I decided to purchase this book, I was mistakenly under the impression that it was going to be accessible to the layman with a curiosity in the subject matter. However, while it's not exactly a "stuffy textbook", it can get overly technical and difficult to digest. At times I felt like giving up, particularly around the middle which, featured almost nothing but heavy statistics and data. However, I persevered onwards, and I'm very glad that I did.
This book was an extremely fascinating read and one that has completely shattered many of the preconceived notions that I had of the English, the Celts, and "Britishness" as a whole. Yes, sometimes it did feel like you need a Ph.D. in History, Archaeology and Linguistics all in one to be able to follow it, but if you're interested enough in the subject to be willing to plough through all of that, then you'll find this a treasure trove worth of information.