The guitarist of the popular group becomes a special agent and solves exciting cases together with an ironic mouse! A new story and new heroes from the author of the bestseller “The Adventures of the Cat-Detective” Frauke Schoynemann, which was sold in Russia with a circulation of more than 1 million copies Book of Tessa . Top secret!" tells not only about the detective investigation, but also about true friendship and school love. You are waiting for atmospheric reading: an unusual assistant of the main character is a clever mouse, a lot of humor and unexpected twists in the plot.