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.

Plot
George and Harold have played a trick or two on nearly everyone at Jerome Horwitz Elementary. When their latest prank causes the school's cranky cafeteria ladies to quit, Mr. Krupp hires a trio of unusual replacements - who happen to be aliens! Will that curtain-caped crusader, Captain Underpants, save the day once more? Or will those outer-space cafeteria ladies have him for lunch?

Why It Rocks

 * 1) The hijinks are wackier, crazier, and much more epic than the last time, and there's actually lots of time spent with the action, unlike the first two where their main antagonists didn't appear until the second halves.
 * 2) At the very beginning, it tells the reader a basic summary of what happened in the first book, so if the reader hadn't read the original first but rather this one first, they'll still get the basic idea of what had happened before.
 * 3) Creative names for the aliens: Zorx, Klax, and Jennifer.
 * 4) Like the other books, it actually uses toilet humor well.
 * 5) In the in-color version, there's a book from George and Harold's past called Dog Man and the Wrath of Petey, and it is very entertaining.
 * 6) The Deliriously Dangerous Death-Defying Dandelion of Doom.
 * 7) Captain Underpants gets super powers!
 * 8) Good ending where the aliens are defeated, and they use the antidote to cure the zombie nerds.

Bad Qualities

 * 1) Some mean-spirited moments, such as the comic books George and Harold made about the lunch ladies.
 * 2) The food George and Harold were eating in Mr. Krupp’s office looks disgusting.