Hilarious and Fast-Paced Adventure for Kids Who kidnapped Olive Klein? Olive Klein is the biggest roublemaker her school has ever seen. And now, she’s gone! What exactly is the Mountain? And who exactly is this secret group called Middle Squad? Leave it to Olive to figure it out. And maybe, just maybe cause quite a bit of… TROUBLE IN THE PROCESS!!! The Unbeatable Olive Klein is a funny and fast-paced adventure featuring rip-roaring action that will hook young readers from the very first page. It is the NINTH book in the Project Gemini series.