Got just over a quarter of a way through this and couldn't take anymore. It's full of walking cliches rather than characters and way too many modern sensibilities & attitudes for anyone to believe it is taking place in medieval times. Any historical event or place mentioned merely acts as backdrop or wallpaper and was obviously not well researched. There's more but I will leave my list of gripes here as I really don't feel like investing anymore time and effort in this ridiculous novel.
If you are interested in finding out more about these exceptional sisters from Provence then I would advise against wasting your time with this novel and recommend you go straight to Nancy Goldstone's excellent and reader friendly biography, [b:Four Queens: The Provençal Sisters Who Ruled Europe|3017900|Four Queens The Provençal Sisters Who Ruled Europe|Nancy Goldstone|http://d.gr-assets.com/books/1347931433s/3017900.jpg|677345].