Dan Gutman

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.

A skateboarding principal offers unusual incentives to his students to motivate them to learn more.

When a British student-teacher arrives, A. J. and his friends wonder if her all-black clothing and love of blood sausage mark her as a vampire, while Mr. Granite simply hopes her musician-boyfriend will stay away long enough for a math lesson.

A.J. and his classmates are convinced that the new school librarian, Mrs. Roopy, has multiple personality disorder because she keeps pretending to be famous people.

A.J. and his friends find out what amazing things Miss Lazar, the Super Custodian at their school, can do.

A.J. and his friends think that Ms. Todd is the strangest substitute teacher in the world, and they decide to investigate her.

The new lunch lady at Ella Mentry School, Ms. LaGrange, writes secret messages in the mashed potatoes and tries her best to get A.J. and the other students to eat healthy foods.

"Miss Z, a mysterious billionaire and a collector of rare photographs, is sending her four recruits back in time on a mission to capture, for the first time, one of the most important moments in American history-- Abraham Lincoln giving his famous Gettysburg address"--

Mr. Docker must be a mad scientist. He does nutty experiments and has an evil, demented, cackling laugh. Plus he invented a car that runs on potatoes! Mr. Docker is the weirdest science teacher ever! Is he trying to take over the world?