Here's An Exclusive Look Inside The New "Captain Underpants" Book

Captain Underpants and the Sensational Saga of Sir-Stinks-A-Lot hits bookstores on August 25.

Captain Underpants and the Sensational Saga of Sir-Stinks-A-Lot, the latest book in the Captain Underpants series, comes out on August 25.

Image courtesy of Dav Pilkey (c) 2015

This is the 12th book in the Captain Underpants series, written by Dav Pilkey.

Image courtesy of Dav Pilkey (c) 2015

And it's full of lots of fun illustrations, as per usual.

Image courtesy of Dav Pilkey (c) 2015

Image courtesy of Dav Pilkey (c) 2015

Everyone's favorite characters George and Harold are up to no good, yet again.

Image courtesy of Dav Pilkey (c) 2015

They're causing a ruckus with their doubles, Yesterday George and Yesterday Harold.

Image courtesy of Dav Pilkey (c) 2015

But the real question is: Will they be able to put their shenanigans aside to save all of humanity?

Image courtesy of Dav Pilkey (c) 2015

Pre-order your copy of Captain Underpants and the Sensational Saga of Sir-Stinks-A-Lot to find out what happens!

Scholastic Press