Shatterproof (The 39 Clues Cahills vs. Vespers #4)AN OUTRAGEOUS CRIME Thirteen year old Dan Cahill and his older sister Amy have committed a string of thefts that lands them on Interpols Most Wanted list. But the crimes are not Amy and Dans fault. A shadowy organisation known as the Vespers has kidnapped seven members of the Cahill family. If Amy and Dan dont deliver a series of bizarre ransoms its lights out for the hostages. Until now Amy and Dan have stayed one step ahead of the police and managed