Wow....I can tell you that the main character, Juliette, is certifiable! She is just so crazy in her obsession. There is a point in the book that you find something out that set Juliette on her crazy course. I think the author did a good job of making you feel sorry for Juliette a "tiny" bit but that feeling doesn't last!
The first maybe 30% seems extremely slow but the rest.....I flew through as the plot just got more twisted!