Naturkunden is a 9-book series with 9 released primary works first released in 20 with contributions by Ludwig Fischer, Samuel Hamen, Desmond Morris, Cord Riechelmann, Eckhard Fuhr, Lothar Frenz, Wilhelm von Bode, Peter Geimer, Judith Schalansky (Hg.), Joachim Sartorius, Beatrix Langner, Bernhard Kegel, and Karin Schneider.