David was not the most confident or bravest of eleven-year-olds, unlike his younger, very self-assured and single-minded sister, Rebecca.
One stormy night, whilst staying at their parent's country cottage, the children saw a mysterious light outside their bedroom window. It transported them into a strange parallel world of hedgehog-like creatures known as Gippings.
The Gippings had brought them to their world to ask them to help retrieve their...