Captain Underpants and the Attack of the Talking Toilets

Captain Underpants and the Attack of the Talking Toilets is an American children's book (taking the form of a novel) by Dav Pilkey, and the second book in the Captain Underpants book series, being a sequel to The Adventures of Captain Underpants. It was published on February 1, 1999.

Plot
George and Harold are up to their usual tricks. Last time they hypnotized Principal Krupp into believing he was Captain Underpants. Now, by mistake, they bring to life the most disgusting, life-threatening monster - the Talking Toilets and the terrible Turbo Toilet 2000. Can anyone save the school from the terrifying attack of the Talking Toilets?

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 original where its main antagonist didn't appear until the end.
 * 2) A funny running gag where chapters keep adding onto a previous chapter's name, going from "The Invention Convention" all the way to "The Invention Convention Detention Suspension Prevention".
 * 3) 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.
 * 4) Like the first book, it actually uses toilet humor well (this is a book about toilets, so it's not completely unexpected, however), as the antagonists, who are living toilets, are actually quite funny.
 * 5) In the in-color version, there's a book from George and Harold's past called Dog Man in: The Tongue of Justice, and it is very entertaining and it's premise is actually quite original for a mind-control story.
 * 6) Good ending where the Incredible Robo-Plunger fixes everything that happened during the toilet attack, and George and Harold become teachers for a day while the staff (and Melvin) gets their comeuppance for being rude.
 * 7) The talking toilets’ catchphrase “Yum, yum, eat em up!”.

Bad Qualities

 * 1) It introduced Melvin Sneedly, an unlikable Gary Stu, although he doesn't have a big role.
 * 2) Some mean-spirited moments, such as when George and Harold ruined The Second Annuel Invention Convention by ruining everyone’s (except Melvin Sneedly’s) inventions.