The Wild Chicks (Die wilden Hühner) is a series of children's and youth books written by the German author Cornelia Funke. The main protagonists are four (later five) girls, who go to class together and form the eponymous "Wild Chicks" girl gang. Five books were published between 1993 and 2003, which have sold over one million copies in Germany. Three feature-length film adaptations have been released. Source: Wikipedia (en)