The Queen, Her Lover and the Most Notorious Spy in History: The intriguing true story of Queen Victoria's secret
I can't help thinking that the book actually got a lot more interesting once the later spy arc started. That's what sparked my interest. I wish more of the book has been about that rather than going on about Victoria's rumoured love affairs. I also found interesting that she was involved with Karim as that has been relatively hushed up in comparison to her relationship with John Brown.