About the book: year / The guitarist of a popular band becomes a special agent and solves exciting cases together with an ironic mouse! The first book in the spy trilogy. A new story and new characters from the author of the bestseller “The Adventures of a Detective Cat” Frauke Scheunemann, which was sold in Russia with a circulation of more than 1 million copies. The book “Tessa. Top secret!" tells not only about a detective investigation, but also about true friendship and school crush. An atmospheric reading awaits you: the main character’s unusual assistant is a smart mouse, a lot of humor and unexpected twists in the plot.