Ella Mentry School counselor Dr. Brad believes wisecracking A.J. may be a genius and subjects him to some very weird tests to find out for sure.

When the new vice principal is put in charge of Ella Mentry School for a few days, she tries out some very unusual ideas about how students learn.

New third grade teacher Mr. Granite has so many strange ideas about how to make Ella Mentary School environmentally friendly that the students are sure he must be an alien.

The After School Kids' Care director wants to get into The Guiness Book of World Records, and A.J. and the gang jump in to help him.

As their cross-country journey with their parents continues through the midwest, twins Coke and Pepsi, now thirteen, again face strange assassins at such places as the first McDonald's restaurant and Cedar Point amusement park.

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.

"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"--

Sent back in time to 79 AD, on a mission to photograph the eruption of Mount Vesuvius, the Flashback Four race to get their picture.

Could Mrs. Roopy, the new librarian, be A.J.'s craziest teacher yet? When the class shows up they find her dressed first as George Washington and then Little Miss Muffet. And Mrs. Roopy won't even admit that it's her! Can A.J. and his class help their very troubled librarian before she does something really crazy?

"Summer is almost over, and you know what that means--time to head back to school! But when a tropical storm ends A.J.'s vacation earlier than expected, he and his family have to stay at Andrea's house. Ugh, disgusting! When everyone in the house starts getting cabin fever, and even back-to-school shopping won't calm the kids down, Andrea and A.J. are sent to Camp Ockatollyquay. The catch? It's a camp to get kids ready for school! But not to worry--Andrea...