The Knickerbocker Gang
The Knickerbocker Gang is a series of books for children by Austrian writer Thomas Brezina. It features stories about junior detectives called Axel, Poppi, Lilo and Dominik, who solve mysteries. The books, originally in German, have been translated to many different languages. They remain a huge favorite in Turkey in the children's novels sections, even finding a place on many primary school curricula. The 1997 Austrian TV series Die Knickerbocker-Bande was based on the books.