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.

Genius twins Coke and Pepsi McDonald embark on a trip to Graceland and are horrified by the reappearance of their supposedly deceased arch nemesis Dr. Herman Warsaw, who marries their aunt Judy.

"Tween twins Coke and Pepsi McDonald have finally reached the last leg of their wacky and dangerous cross-country road trip, but they must fend off a host of strange assassins before they reach their home in California"--

"Did you know that Theodore Roosevelt was shot before a rally, and went on to give his speech with the bullet in his chest? Or that he skinny-dipped in the Potomac River? Bet you didn't know that he had a zebra, a lion, and a one-legged rooster at the White House! Siblings Paige and Turner have collected some of the most unusual and surprising facts about the larger-than-life president, from his childhood and his Rough Rider days to his rise to politics...