The story begins with a mysterious egg washed up on a Scottish beach, the morning after a great storm.
Kirstie and her brother Angus find the egg and take it home.
The next day it has hatched into a tiny greeny-grey creature with a horse's head, warty skin, four flippers and a crocodile's tail.
The baby sea monster soon becomes the family pet - but the trouble is, it just doesn't stop growing!
- Format: Paperback
- Pages: 96 pages, Illustrations
- Publisher: Penguin Books Ltd
- Publication Date: 03/01/2008
- Category: General
- ISBN: 9780141302232