Problems in Prague

"My name is Jeremiah Ethan Bennett, Jr., also known as JJ. I'm twelve years old, and a spy for the CIA, only they don't exactly know it."
JJ Bennett has never dodged bullets from Russian spies. He's never broken into a thousand-year-old crypt. He's never dangled by a piece of rope two hundred feet in the air.
But all that is about to change.