This was great. Sybil is hard to like. She treats others terribly because she's tortured by guilt and she's sad and lonely because she pushes people away. I totally get Fiona's frustrations. But part of me can't help but relate to her with the way she writes her correspondence. I love that she writes letters to everyone, including people she's never met like the authors of the books she reads. I still don't like her much in the end, but it was very interesting to get to know her. And it was pieced together very well by the author.