'The sign on the enclosure wall read: GREEPERS.But perhaps it would have been more accurate if it had said: HEAPS OF GREEPERS. And maybe there should have been a second sign that said: AND THEY'RE FLYING STRAIGHT FOR YOU!' A dead grandpa. A secret alien zoo. And only two kids to save all its creatures from a terrible fate. What could possibly go wrong? Funny, mysterious and a little bit rude; hold on to your hippos and look inside The Alien Zoo!