Once again George Beard and Harold Hutchins, the boys responsible for the hilarious comic-book series involving the adventures of Captain Underpants, are up to their old antics.  One day they're happily playing in the school gym, squishing ketchup packets under their skateboard wheels, and who should come by but that mean principal, Mr. Krupp. For punishment, the boys have to clean the gym floor and write a 100-page essay on "Good Citizenship," with strict instructions not to turn in a 100-page "Captain Underpants" comic book.  As they mope over this assignment, George is struck by a great idea:  Why not create a new super hero and write about him?  The boys go home and create the greatest world protector ever known to potty training, Super Diaper Baby.

Fans of the toilet humor seen in the previous "Captain Underpants" books, or anyone who's a fourth-grader at heart, will laugh out loud at the villain that gets turned into a piece of poop and his newborn nemesis, the only one stopping him from world domination.  The pages are packed with gross jokes, Flip-O-Rama, and subtle humor especially appreciated by older readers.  While this book is recommended for everyone seeking a laugh, it should come with a warning:  Read this book in private or only around people who know you --- anyone else might think you're crazy for laughing out loud, seemingly at random.