This book is written by Eva Gray. This book is the third book in the Tomorrow Girls series, the first one is Behind the Gates and the second one is Run for Cover. This book is really good. The series is about four girls and it is in the future and there is a war going on there. The girls get sent to a school that is supposed too keep them safe. Once you start reading this book you won't want too stop. I really like the characters in this book. I think the age groups that would like this book are 10-14. The ending of the book makes you want too read the next one in the series.