Bruno Hachler is a freelance author and musician. He has published other titles for Michael Neugebauer publishing including Hubert and the Apple Tree and The Bear's Mystery. Currently he is working on a CD of children's songs, as well as on a novel for adults. Birte Muller was born on 7th September 1973 in Hamburg where she still lives and works today. After finishing school she travelled in Australia for six months. In 1995 she enrolled in Hamburg's University of Applied Sciences for Illustration and Communications Design. In 1999 her children's book illustrations were selected for the exhibition and the catalogue of the International Book Fair in Bologna.