Tell us the language. Italian? I can help you (maybe the same for spy). French? I have a friend that can help you. English? There are hundred of persons on this wiki that can help you. Other? Well, I don’t think you’ll ever find what you’re looking for.
Sorry for the late reply, I read in English. I found a listing on Amazon and it's an "escape book", apparently some sort of book of paper puzzles to solve, I assume it's not really additional plot lines.