Philippa Gregory, best known for her fictional account of Mary and Anne Boleyn in The Other Boleyn Girl has recently released a new novel, The White Queen. The novel is set during the Wars of the Roses and follows Elizabeth Wydville, who eventually became wife and Queen of Edward IV. She is also the mother of the two "Princes in the Tower" who later disappeared.
Linked below is a nice review of the book which gives a very good synopsis. To me, the synopsis goes fairly well with history...but I have heard that Gregory said this is the least accurate of her historical fiction works so far. Hum, we shall see.