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These detective stories will capture anyone's imagination and make them solve crimes together with two detectives - Kalle Nyssper and Gitta Tämker. They work around the clock to put an end to the craft of all kinds of villains. They solve even the most complicated cases with ease! While reading the book, be careful: it is full of fraudulent tricks! Only those who read the text carefully and look at the pictures will be able to get on the trail of criminals. So let's go ahead, because the detectives are on their way!