What do you get when you mix toilet monster villains, pterodactyl hamster heroes, Super Diaper Baby comic strip interludes, and a "glow-in-the-dark, time-traveling Robo-Squid suit?" A Captain Underpants adventure about saving the planet from impending doom! In this engaging installment in the now nearly iconic series, the text directly addresses the reader ("Remember back in chapter 1?"), and young superhero fans can team up with George, Harold, and Captain Underpants (aka the hypnotized principal of their school), as well as "guest illustrator, Timmy Swanson (age four) . . . and Nana Gertrude (age seventy-one)," for the battle of the century. Now, as Pilkey asks, "that wasn't confusing at all, was it?" Good. We didn't think so. Captivating comic drawings with flip-book mechanisms, punny toilet jokes ("It's just a flush wound"), and action-packed adventures make this a sure winner for fans and newcomers alike. HIGH-DEMAND BACKSTORY: With more than 70 million Underpants titles in print, this series only increases in worldwide popularity. Prepare for the stampede.

In the eleventh episode of their epic adventures, George and Harold once again battle the Turbo Toilet 2000. Helped along by comics-style illustrations, the energetic plot includes time travel, prankster humor, and lots of cartoonish absurdity. This installment is best for fans of the previous books, who will understand the series' many connecting threads.