I've not read this novel yet but there's a very full review by Marie Burton on the web. It looks intriguing, time will tell whether it hits my wall or not.
I have a suspicion that Yorkists and Woodvillians are generally less tolerant of historical divergence (or more picky) than Tudorites, but we shall see.
It's is probably about time someone did a novel from the POV of Elizabeth Woodville, though of course it has been done before, notably by Rosemary Hawley Jarman in The King's Grey Mare. Apparently a common thread in both is that Elizabeth's witchiness is emphasised. Personally I'm more impressed by what Elizabeth achieved off her own bat, without special powers!