Why wasn't he born in London or Chicago? Or in another big city where crime is still on the agenda? Instead, 12-year-old Kalle Blomquist is sitting in this boring little town of Kleköping in Sweden, waiting as a master detective for his first case. But then he finds a strikingly shimmering pearl in an old castle ruin and soon hears about a major jewel heist. The time of the master detective has come. Kalle Blomquist's first case - now finally available as a paperback.