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!

This secret mission will take them to the weirdest corners of America. Can two bickering twins outsmart the world’s most dangerous villains?

Secret Agent Action: Coke and Pepsi aren't just brother and sister—they're secret agents in a program so dangerous, they might not survive the first week.
A Cross-Country Road Trip: This isn't your average family vacation. From getting chased off a cliff in California to a showdown at the SPAM Museum, this RV trip is one for the history books.
Codes and Ciphers to Solve: Follow the clues alongside Coke and Pep as they try to crack the cryptic messages that could save their lives... or lead them straight into a trap.
Weird (and Real!) American Landmarks: With stops at the world's largest balls of twine and the mysterious House on the Rock, this adventure is packed with the wacky, weird-but-true facts that Dan Gutman fans love.

The Genius Files: Mission Unstoppable

The Genius Files: Mission Unstoppable