Instruct: Classify a given review as either positive or negative.
Query: Very interesting

This is a very interesting book. I do like the way that the authors introduce the topic. The only thing I would say that could be considered wrong is their instant presumption that the ruins are Celtic. I do think, however, that there is very solid evidence to prove that the ruins mentioned in the book are indeed Celtic in origin, and that the matter deserves to be further investigated.