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.

Coke McDonald and his twin sister, Pepsi, think their family's cross-country RV vacation is nothing to get excited about...until they're chased off a cliff, locked in a burning school, and receive mysterious messages in codes and ciphers. From California to Wisconsin, it's a race against time to find out who's after Coke and Pep, who's leaving the notes...and just what being a part of The Genius Files entails!

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 Pep 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!

Coke and Pepsi McDonald didn't want to jump off a cliff.

They didn't want to get hit by poisoned darts from blowguns either. And they certainly don't want to get locked in their burning school, thrown into a pit at the top of a sand dune, or drowned in a vat of liquified SPAM. But what are you supposed to do when you're being chased across the country by your insane health teacher and two guys in bowler hats who are trying to kill you? One thing's for sure, it'll be a snap for Coke and Pep to write their essays on "How I Spent My Summer Vacation."

Want to join in the fun? Fire up the old Google Maps and follow the McDonald twins as they get chased from the Pez museum to the largest ball of twine in the world.

Watch out for the Frisbee grenades!

Gutman, Dan

Dan Gutman is the New York Times bestselling author of the Genius Files series; the Baseball Card Adventure series, which has sold more than 1.5 million copies around the world; and the My Weird School series, which has sold more than 34 million copies. Thanks to his many fans who voted in their classrooms, Dan has received nineteen state book awards and ninety-two state book award nominations. He lives in New York City with his wife. You can visit him online at dangutman.com.