Well, I've finished reading it for the first time, and I say first time because I got the ambiguous ending, and I also wanted to ask for help to find out how to get the good ending (assuming there is one). I also have to say that I loved the entire novel: the settings, the story, the characters, and the fact that Javier is Mexican haha (I am too), It's worth noting that it's generally difficult to find novels that feature a character of Mexican nationality, so I appreciate that small detail.