It's been a while since I've read a mystery kind of novel and this was very good at that, building up the tension. But it was the characters that make me fell in love with the book. I usually decide right away which character are the good and the bad ones. In this story, however, the characters just didn't stay in the same box I put them. They were constantly changing, lots of secrets were revealed about them which made them loveable in one chapter and an irritating character in the next.
In my view there are two main characters in this book, two male characters who are the exact opposites of each other. One is a funny, lively English man who works for the other who is unapproachable, cold and gave me a chill sometimes.
There was also a love-triangle (in fact, two of them) but one could not decide who was going to end up with whom.
I didn't know this book was the last one in a sequel because it is an independent story with no references to the previous books and a few sentences were enough to guess what had happened before.
This novel is amazing, I finished it in two nights, I even read a few pages if I had a few minutes for myself during the day which I only do with the books I can't put down.