nbsp 39 Clues Unstoppable Series 3 Books Collection Setnbsp Description nbsp Unstoppable 1 Nowhere To Run The Cahill family has a secret For five hundred years they have guarded the 39 Clues thirtynine ingredients in a serum that transforms whomever takes it into the most powerful person on earth If the serum got into the wrong hands the disaster would rock the world So certain Cahills have always made it their mission to keep the serum safe buried locked away Until now Thirteenyearold Dan Cahill & his older sister Amy are the latest guardians of the Clues They think theyve done everything right but a tiny mistake leads to catastrophe The serum is missing & Dan & Amy have to get it back & stop who stole it before its game over For everyone Unstoppable 2 Breakaway A Nightmare Come True As a member of the most powerful family history has ever known thirteenyearol Dan Cahill has been shot at kidnapped & even thrown into a pit with a deadly snake Hes survived it all due to luck smarts & his older sister Amy who always sticks by his side Now Dan & Amy are facing their greatest threat yet an enemy who has found a way to use the source of the Cahill family power against them To stop him Dan & Amy must set out on a desperate mission that will take them from one of the worlds hottest regions all the way to the frozen blast of the Arctic Circle But with the enemy closing in Dan finds himself facing the one terror he never imagined being betrayed by his own sister Unstoppable 3 Countdown Life or Death The clock has run out for thirteenyearold Dan Cahill As head of the most powerful family the world has ever known he & his older sister Amy have been in the crosshairs for too long Dan & Amy have always managed to stay a step ahead of their enemies but it was only a matter of time until luck failed them Now Dan is hopelessly trapped & nothing can save him Nothing except unleashing an evil into the world even worse than the enemies closing in As Dan hovers between life & death Amy has a terrifying decision to make Just how far is she willing to go to save her little brother