I finally got a chance to read this book, recommended by a local store clerk. Unfortunately, when I got to the chapter in which Eloise finds information that might help her find out who the Pink Carnation is, it was easy from then on for the reader to know who the Carnation was indeed. It was way too predictable. The story (of all these spies) *is* interesting, it's just too bad that Willig could not come up with other possibilities to tell the reader who the spy was. In the end, there was no twist, and the ending actually left me unsatisfied. No, I won't spoil it and tell you who is the Carnation, you will find out yourself when you read it. And no, I will not read the follow up of the book, The Masque of the Black Tulip.
Despite this, Willig's writing is quite enjoyable, and the book reads very easily. If you like predictable novels, you'll definitely enjoy this one.
4/10