🎬 TKKG

About

TKKG is a German detective series for children and young adults, whose name is formed from the initials of four friends: Tim, Karl, Klaus, and Gabi. The series has been published since 1979 as books and radio plays, becoming one of the most popular children's detective franchises in German-speaking countries. "Das Geheimnis der Siegelringe" is one of the stories in which the four friends solve a mysterious case involving signet rings.