Shatterproof by Roland Smith

Scholastic, 2012. ISBN 9780545298421.
The fourth book in the 39 Clues series, Shatterproof by Roland Smith, takes the Cahill family into even more danger. Unpredictable and ruthless, their enemies, the Vespers, are forcing Dan and his sister, Amy Cahill, to commit crimes in order to ensure the release of seven kidnapped members of the Cahill family.
Not only must Dan and Amy stay one step ahead of the Vespers, but they are also being pursued by the police, desperate to stop the crime wave created by the Cahill's.
The action takes place in exotic far flung places, from Samarkand to Timbuktu and Germany in-between. In a race against time, Dan and Amy must rely upon their wits to unravel mysterious secrets.
How do the Vespers stay so close to Amy and Dan? Is there a spy working amongst them? Will Amy and Dan manage to save their family?
Inside the book cover are game cards and a link to the website so that readers can stop the Vesper Mole!
Thelma Harvey