What did Jean Plaidy write?

Jean Plaidy wrote The Thistle and the Rose, The Borgias: Two Novels in One Volume, Courting Her Highness: The Story of Queen Anne, Royal Road to Fotheringhay: The Story of Mary, Queen of Scots, Mary, Queen of France: The Tudor Princesses, For a Queen's Love: The Stories of the Royal Wives of Philip II and Madame Serpent: A Catherine de' Medici Novel (Catherine De' Medici Trilogy).