Book excerpt: In the acclaimed historian’s debut novel, a lady-in-waiting in the court of King James is caught up in the Gunpowder Plot of 1605. England, 1603. Nursing Queen Elizabeth through her last days, court healer Frances Gorges dreams of her parents’ country estate, where she first learned to use the medicinal secrets of flowers and herbs. Frances is happy to stay at home when King James of Scotland succeeds to the throne of England. His court may be shockingly decadent, but his intolerant Puritanism sees witchcraft in many of the old customs—punishable by death. When her ambitious uncle sends Frances back to the royal palace as a nanny to the princess, she is a ready target for the twisted scheming of the Privy Seal, Lord Cecil. As a dark campaign to destroy both King and Parliament gains momentum, Frances is surrounded by danger. She finding happiness only with the King’s precocious daughter, and with Tom Wintour, the one courtier she feels she can trust. But even he has secrets to hide…