Those holes, are what make it interesting to me. I get to fill it in myself. Why do you think you thought there were to many holes, while you also want to use your own imagination? That sounds like a contradiction.

I did think the ending was anticlimatic, but it did have a huge punch emotionally. Two people who have been looking for each other for years, and they miss each other because the sister wants to kill herself after she lost the man she loved. (Indeed, two worlds in one.) And then the Riselka on the last page. I hated that moment. WHAT HAPPENS??? GRMBL.

It would be good though to find out what would happen if I read it again. I bought it when I was 17 at most, and I think I reread it twice over the few years. Right now I haven't read it in years, so I might be getting older too.