Written by Craig Hatkoff and his daughters , the 44-page book entitled Knut , der kleine EisbÃ renjunge ( Little Polar Bear Knut ) is about Knut 's life story as well as photographs . Written by Craig Hatkoff and his daughters Juliana and Isabella , the 44-page book entitled Knut , der kleine EisbÃ renjunge ( Little Polar Bear Knut ) includes Knut 's life story as well as previously unpublished photographs .