The Cut Out by Jack Heath

Fero isn't a spy.

But he looks exactly like someone who is: Troy Maschenov - a ruthless enemy agent.

But what starts as a case of mistaken identity quickly turns into a complicated and dangerous plan. Fero is recruited to fight for his country. He will have to impersonate Troy, enter enemy territory, hunt down a missing agent and bring her home in time to prevent a devastating terror attack.

Fero is in way over his head. Hastily trained, loaded up with gadgets and smuggled across the border, he discovers the truth about espionage.

Getting in is easy. Getting out alive is hard.