Mr. Garrison assigns his fourth grade class to read J.D. Salinger's "The Catcher in the Rye." The boys are excited after hearing about how the book has been banned for its salacious content, but soon discover that the book (in their eyes) isn't as raunchy as they think, prompting the four of them to create their own controversial novel. But when Stan's mom finds the book, the boys pin the blame on Butters and Butters becomes famous.

Source: Comedy Central