Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space

Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space (and the Subsequent Assault of the Equally Evil Lunchroom Zombie Nerds) is the third book of the Captain Underpants series by Dav Pilkey, notable for its long title. The series of American children's books are about two fourth grade, George and Harold, and their mean principal Mr. Krupp. This book was mentioned by George as the book with "the annoyingly long title". Three evil aliens, Zorx, Klax, and Jennifer, land on the school roof and plan to take over the Earth by disguising themselves as cafeteria workers and feeding the kids alien food to turn them into evil zombie nerd and then using the kids to take over the world. Meanwhile, in science class, George and Harold learn about the effects of mixing baking soda and vinegar together (the two ingredients don't mix and make a slimy sticky liquid, they explode). They decide to play a prank on the cafeteria ladies by giving them a recipe... full article at wikipedia