'Captain Underpants,' 'Part-Time Indian' top challenged books list

It’s been 16 years (!) since Dav Pilkey’s inaugural novel about a certain tighty-whitey-clad crusader first hit shelves — but some parents are still wishing that the superhero would go up, up, and away.

Pilkey’s Captain Underpants series tops the American Library Association’s list of the past year’s “most frequently challenged books,” an annual account collected by the Office for Intellectual Freedom.

Though the ALA is currently celebrating Banned Books Week, the items on this list haven’t necessarily been barred from libraries; instead, they’ve been the targets of “formal, written complaint[s], filed with a library or school requesting that materials be removed because of content or appropriateness.” The ALA notes that the number of challenges reflect only reported incidents — though it estimates that “for every reported challenge, four or five remain unreported.”

Find a full list of 2012’s most frequently challenged books — as well as the reasons given for those challenges — below.