The Junior detective series TKKG is a series of radio dramas and novels created by Stefan Wolf.
In all German-speaking countries they are the most commercially successful series of novels of their type, apart from The Three Investigators. They call themselves TKKG, after the initials of their names: Tarzan (later renamed in Tim, because "Tarzan" is a trademark), Karl, Doughnut (in German Klößchen, in Australia called "Klumpling") and Gab(b)y; an unofficial fifth member is Gaby's Cocker Spaniel, called Oskar. Since 1979 they continually solve all sorts of crimes, from thefts and robberies to kidnappings and terrorism.
