This is a true historical fiction. It is rich with characters, culture, and daily life of the times. It reminds me of the Greenlanders by Jane Smiley because it likewise gives a glimpse into life at a certain time and place through the lives of the characters (Circle of Stones is in 12th Century Wales). From other reviews I've read, perhaps you need to be an historical fiction fan to really like this book. Some felt it lacked a plot. Personally, the first couple pages were hard to get into, and I was afraid I'd be disappointed, but it grabbed me right after that, and I've been loving it ever since.
I'm about 60% done. I like learning about some of the herbal remedies they used at the time. I think that is an added benefit. One thing with historical fiction...when they base it on real-life characters, they are somewhat tied to the true story, to the best of their knowledge. I am really enjoying this, but there are some things I wish could be different. I would like to find an historical fiction of this caliber that is not based on real people who existed so there can be a bit more happiness. I don't want to spoil anything, so I am being intentionally vague in what I mean here, sorry.
having gone a bit farther (75% done), things do improve, happiness-wise. I won't say anything about it bc I don't want to ruin the story.
Completely done, and I loved it. In the beginning of each chapter, the author takes an excerpt from an historical book. I love that bit of research thrown in, and it sets the stage for where the story she is spinning goes next. At the end of the book, she has quite a bibliography. Going to read the next book, Circle of Stars.