Operating codes

Upon moving to Sentinel House, five-year-old Matty and fifteen-year-old Graham encounter ghosts from a nearby abandoned military compound, but real trouble begins when their father is arrested for posting information about a secret weapons system on the Internet.

שנה

2009

שפה

English

הוצאה

Little, Brown Books for Young Readers

מהדורות

1

ISBN

9780316088817

מקור הנתונים: Wikidata