Philippa Gregory is best known for her novel The Other Boleyn Girl. I read that one and enjoyed it but found it too sexual for my comfort zone. The White Queen isn't nearly as sexual but isn't nearly as good either.
The White Queen is a reference to Elizabeth Woodville, the wife of King Edward IV, which was during the Wars of the Roses, a time period I don't know enough about but am definitely interested in. She entrances him with her beauty, and if rumors are to be believed, her mother's witchcraft. Her family considers themselves to be descended from Melusina, a water goddess, and they seem to have certain powers through her. The book spans a couple of decades in which there is very little peace and the almost constant warring is devastating to everyone involved. I don't really want to give away any more than that in case you aren't aware of the history (I wasn't until I read the book). I would have liked there to be more facts, more meat so to speak, in the book and less romance and fantasy. It is loosely based in the time period but comes off as a light romance. I enjoyed reading it for the most part except for that disappointment in finding it to be lightweight. There were no obscenities to speak of, maybe a few but nothing really offensive. The sex wasn't overly descriptive but she always seem to be waiting for him to come home and say, "Bed, wife". At least they were married. There was an attempted rape at the beginning and lots of commentary on his constant whoring and also some violence. Hmm, either a PG-13 or PG-16 depending on how squeamish you are. For adults it is fine, for teens you may want to read it first.