Helen Castor is a British historian, author, and broadcaster, known for her expertise in medieval history, particularly the history of women and gender in the medieval period. She has written several notable books, including "She Wolves: The Women Who Ruled England Before Elizabeth" and "Medieval Life: The Life and Times of Medieval England." Castor is also known for her appearances on television and radio, where she discusses historical topics and themes, often bringing attention to lesser-known figures and narratives in history. If you have specific questions or need information about her work, feel free to ask!