Your Grandparents Are Spies - Anson Montgomery - Bog

You don't know everything about your grandparents--did you know they are actually spies? When your parents go away for a long weekend and your grandparents are in charge, you and your brother and sister can go zip-lining, or maybe even to the moon? Your grandparents are happy to call in a few favors, but they might need your help. A man with a scar has stolen an important briefcase. Where will you go? YOU choose what happens next.