As the children of two world-famous explorers, eleven-year-old twins Celia and Oliver prefer television-watching to adventure-seeking--until their father takes them to Tibet to help search for their long-lost mother.

If Oliver and Celia Navel had any hopes this year would be less life threatening than the last, they are quickly shattered... along with their television set. When a strange scientist warns them that their mother is - yest again - in peril, it's off to the Pacific Ocean they go. But navigating stormy seas proves easy comparing to tackling a Kraken - an enormous squid - and the twins think they might have bitten off more than they can chew. In their...

Eleven-year-old twins Oliver and Celia Navel are forced to give up television again, this time for an adventure on a South Pacific island surrounded by giant killer squid.