In eight days, Coke and Pepsi McDonald are going to turn 13. Before then, they'll jump off a cliff, get trapped in the locked basement of their burning school, chased cross-country by murderous lunatics, left for dead in the pit of a sand dune, forced to decipher mysterious coded messages and visit ...

In eight days, Coke and Pepsi McDonald are going to turn 13. Before then, they'll jump off a cliff, get trapped in the locked basement of their burning school, chased cross-country by murderous lunatics, left for dead in the pit of a sand dune, forced to decipher mysterious coded messages and visit the world's largest ball of twine.

*The most exciting road trip in history begins In this action-packed, New York Times * bestselling adventure, twelve-year-old twins Coke and Pepsi McDonald embark on a family vacation you'll have to read to believe.*With the real-kid humor that has earned Dan Gutman millions of fans around the world, and featuring weird-but-true American tourist destinations, The Genius Files *is a one-of-a-kind mix of geography and fun.

As Coke and Pepsi dodge nefarious villains from the Pez museum in California all the way to the Infinity Room in Wisconsin, black-and-white photographs and maps put young readers right into the action.

And don't miss the next leg of the journey in* The Genius Files: Never Say Genius*