It could be seen as historical fiction, since the setting is familiar (medieval-ish), while the fantasy elements are quite sparse and hardly dominate the story. There are a lot of characters, plenty of dialogue and generous amounts of feudal scheming. But as to whether you should go for it, I don't know. If you don't find yourself interested in the first chapters, maybe let it go for now and try it again some other time. Definitely don't try to slog through it.