39 Clues: Doublecross

Website: http://the39clues.scholastic.com

by Various

Books in This Series

1. Mission Titanic by Jude Watson Cover ImageBuy from Amazon.co.ukBuy from Amazon.comBuy from WaterstonesBuy from HiveBook
2. Mission Hindenburg by C. Alexander London Cover ImageBuy from Amazon.co.ukBuy from Amazon.comBuy from WaterstonesBuy from HiveBook