We all have access to historical records, so to take a story from the past and create new thoughts based on that history is fraught with danger. But the author sets out the core facts with accuracy and clarity, creating a great sympathy for the main two characters, Frances Howard and Robert Carr. Suddenly the story twists and Howard is revealed as someone evil - not just Carr was deceived, but the author has very skillfully allowed the reader to be deceived as well.
The reader has the scales dropped from their eyes and the author offers us the thought that - at the end - so did Carr. An immensely satisfying book. The interweaving of fiction and history doesn't get much better.