On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.

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!

Today is Coke and Pepsi McDonald's thirteenth birthday. Someone's out to make sure they never make it to thirteen and a half. Racing across America, the twins will nearly be boiled alive in a huge basket of french fries, frozen to death by soft-serve ice cream, stampeded in a wild stadium riot, kidnapped from a high-speed roller coaster, and worst of all their parents think they're totally joking! Will they survive? Will they defeat Archie Clone? Will they be dropped out of a helicopter onto the tip of the Washington Monument? Will they ever say "genius"?

The most exciting road trip in history has reached its final destination! In this fifth book in the thrilling, New York Times bestselling adventure series, Coke and Pepsi McDonald make it back home to the West Coast—but they’re far from home free! When we last left our heroes, Coke and Pepsi McDonald were in Roswell, New Mexico, and they had just seen a strange beam of light. Now their cross-country road trip is about to take a detour that's out of this world—literally! Once the twins get their feet back on the ground, they embark on the final leg of their trip, which will take them from the Hoover Dam all the way to the Golden Gate Bridge. Chased by nefarious villains, the twins will be trapped with a venomous snake, pushed through a deadly turbine, and thrown into a volcano. And craziest of all, their parents might finally believe them! With Dan Gutman’s laugh-out-loud humor and featuring photos and weird-but-true American tourist destinations like the Alien Fresh Jerky Stand, The Genius Files is a one-of-a-kind mix of geography and fun.

The wackiest road trip in history continues in book four of the New York Times bestselling Genius Files series, following twins Coke and Pepsi as they dodge villains and visit weird-but-true landmarks from Texas all the way to Roswell, New Mexico! After their explosive escape at Graceland, twins Coke and Pepsi are ready to resume their trip across America—only now in a convertible instead of the RV. They travel through Arkansas and Oklahoma, visiting weird-but-true tourist stops along the way, and finally end up in Texas, home of the Weird Capital of the Country, Austin. The twins' many enemies—the bowler dudes, Mrs. Higgins, and Dr. Warsaw—all swear that they're done chasing Coke and Pepsi for good. But when the twins start receiving more codes and ciphers from a mysterious robotic voice, they know someone's after them. They just have to figure out who before the mystery villain finds them first. With the real-kid humor that has earned him millions of readers around the world, and featuring all new weird-but-true locations around America, this fourth book in the New York Times bestselling Genius Files series is absolutely batty!

Doing homework becomes a thing of the past! Meet the D Squad, a foursome of fifth graders at the Grand Canyon School made up of a geek, a class clown, a teacher's pet, and a slacker. They are bound together by one very big secret: the homework machine. Because the machine, code-named Belch, is doing their homework for them, they start spending a lot of time together, attracting a lot of attention. And attention is exactly what you don't want when you are keeping a secret. Before long, things start to get out of control, and Belch becomes much more powerful than they ever imagined. Now the kids are in a race against their own creation, and the loser could end up in jail...or worse!

After her mother dies in 1975, ten-year-old Lemonade must live with her grandfather in a small town famous for Bigfoot sitings and soon becomes friends with Tobin, a quirky Bigfoot investigator.