This is book 2 in Hippo Mystery .
There are 224 pages in this book. This book was published 1997 by Scholastic .
Malorie Blackman was the 8th UK Children's Laureate and is one of the UK's highest profile authors for teenagers and young adults. She has won the Children's Book Award and a raft of other prizes and is the force behind the annual YALC event.
This book is in the following series: