What Sarah Ferguson Really Thinks Of Prince Harry Writing A Tell-All Memoir KEY POINTS Sarah Ferguson praised Meghan Markle for writing her own children's book The Duchess of York is supportive of Prince Harry writing a memoir and believes Princess Diana would be proud of him Ferguson also spoke about her new romance novel, "Her Heart for a Compass" Sarah Ferguson has no issues with Prince Harry telling his story in his own words. The Duchess of York, who has released two memoirs and several children's books, recently weighed in on Prince Harry's upcoming tell-all memoir as well as Markle's children's book, "The Bench." Ferguson had nothing but kinds words to say about the Duke and Duchess of Sussex.