You'll know who this is about if you've read any of the Cadfael series https://en.wikipedia.org/wiki/The_Cadfael_Chronicles

When Christ and His Saints Slept by Sharon Kay Penman is also about the political battle between Matilda and Stephen.

I've read all of them, but I don't know if her portrayal in thebooks is fair, though; it seemed rather negative, from my memories. But all the books are cool, even if a little (a lot?) formulaic.

I agree, so I'm interested to learn a more accurate store. And now that's I've read this article I see they even mention Cadfael. I enjoy the series, but I try to remember it's fiction, not history.