Large image of Cover of Zombies of the Science FairZombies Of The Science Fair
I Was A Sixth Grade Alien, Book 5
Written by Bruce Coville
from the back cover
It's science fair time again, and Tim Tompkins is in trouble. It's only two days until the big event, and he hasn't even finished his project. In fact, he hasn't even started it. Given Tims past history, this is no big surprise. But this year, Tim has a new resource-his alien friend, Pleskit Meenom. Surely with his super-science, Pleskit can help Tim come up with a project for the science fair. But Pleskits potent potion turns out to have side effects that not even an alien could have expected, and soon he's desperately trying to answer the question: "What do you do when you've just amputated your best friends personality?"

Collage of illustrations from  Zombies of the Science Fair