Murder Most Royal is an historical fiction novel by Jean Plaidy.
This novel focuses on the two of Henry VIII's Howard wives, Anne Boleyn and Catherine Howard. It begins with Anne as a young woman leaving for Brussels and her homecoming to England and her subsequent rise to power in the English court. It tells in parallel the life of Catherine Howard, first cousin of Anne Boleyn who goes on to become Henry's fifth wife. The story of the rise and fall of each of these women is told in this story.