I read The Constant Princess by Philippa Gregory last year and enjoyed it so much that I immediately downloaded Three Sisters, Three Queens by the same author onto my Kindle, however, I've only recently got round to reading it.
Three Sisters, Three Queens is about Henry VIII's elder sister, Margaret, who married James IV of Scotland, Henry VIII's younger sister, Mary, who married Louis XII of France, and Henry VIII's first wife, Catherine of Aragon. It's told from Margaret's perspective from the time when Catherine of Aragon arrived at the Tudor court right the way through to the early 1530's.
Much has been written about Henry VIII and his six wives but I knew much less about his sisters so I enjoyed getting to know more about them. Obviously, being a novel, fiction is mixed in with fact, but I've found only recently that I enjoy reading books of this kind. They certainly encourage me to look into particular events and I find myself googling to find out more.
The relationship between the three queens was complex, changeable according to what was happening in Tudor England and Scotland at the particular time, but they eventually discovered that their special connection bound them together.
I really like the way in which Philippa Gregory writes, she makes the books easy to read and easy to follow, however, I must admit that I preferred The Constant Princess to this book. I found Three Sisters, Three Queens to drag a little in places, however, I would still recommend it.