39 clues Unstoppable book 4 flashpoint final hours Tick tock 15 year old Amy KL has only a few days to live. there's a poison cursing through her veins her only chance is to collect ingredients for the antidote. too bad they antidos ingredients are scattered around the world. and too bad the survival is by far Amy's smallest problem yeah it's a joke she needs is also the only thing capable of stopping a deadly enemy Jay Rockford Pierce is the brink of becoming the most powerful man in the world and if he does no one will be safe Amy and her younger brother Dan will do everything in there it takes to bring Pierce down even if Amy must pay the ultimate price.