There was! I have a novel here called Conan and the Reversal of the Detective Case. It's a light novel written by an author who can't be divided into two parts-a derivative doujinshi novel. Although it's not the official version of the reverse referee novel, it's still very exciting. I recommend it to you. As for whether they sell it, I'm not sure. You can check online or ask at the local bookstore. I hope you will like this novel.π