In eight days, Coke and Pepsi McDonald are going to turn thirteen.

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, thrown into a giant vat of SPAM, and visit the world's largest . . . ball of twine!

There's more, but if we told you here, we'd have to kill you.

Megapopular author Dan Gutman brings on the excitement with an action-packed new series that's nothing short of dynamite. Join Coke and Pep on their quest to uncover just what it means to be part of The Genius Files . . . if you dare!

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 30 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.