Thank you for yout answer! I'm glad that you enjoyed visiting Mexico!About my question, your answer cleared all my doubts, I actually finished the book last night and it was great! I can't wait to read the sequel. The truth is that I am fascinated not only by the story which is great, but also by the "observer" and "darkness" concepts. Take care you too and have a great weekend!
Take care you too and have a great weekend!