The planet Norstrilia is the richest
treasure-house in the inhabited universe. That's because the
chief export is stroon, a drug which enables people to live up
to four hundred years old. The Norstrilians were originally from
Old Australia on Earth and brought sheep with them. The sheep
became sick and grew to gigantic size but they also began to
produce stroon, the most valuable commodity known to humans.
Norstrilia has to defend itself using highly sophisticated techniques,
including "Mother Hitton's Littul Kittons". What, exactly,
are the Kittons? You don't want to know, mate!