Mission Unstoppable

The Genius Files series is about two 12-year-old twins, Coke and Pepsi, who embark on a cross-country vacation with their parents, only to find out they have been recruited into a secret government agency. The first book, Mission Unstoppable, sets the stage for the adventures to come. From facing evil villains to decoding secret messages, the twins must use their brains to save the day.