Spies stories Deception Criminals, young_adult_fiction 

Cherub 

A teenage special agent risks being brainwashed when he heads to the Outback to infiltrate a cult in this suspenseful CHERUB novel, featuring a striking new look!CHERUB agents are highly trained, extremely talented—and all under the age of seventeen. For official purposes, these agents do not exist. They are sent out on missions to spy on terrorists, hack into crucial documents, and gather intel on global threats—all without gadgets or weapons. It is an extremely dangerous job, but these agents have one crucial advantage: Adults never suspect that teens are spying on them. In Divine Madness, CHERUB uncovers a link between ecoterrorist group Help Earth and a wealthy religious cult known as The Survivors. James is sent to their isolated outback headquarters on an infiltration mission. It’s a thousand kilometers to the closest town, and James is under massive pressure form the cult’s brainwashing techniques. This time he’s not just fighting terrorists. He has to battle for his own mind. - from Amzon