Dav Pilkey 's `` Captain Underpants '' series tops list of most challenged books again . Toni Morrison , Toni Morrison and Tanya Lee Stone are other repeat authors on top two list . Despite the legal precedent , schools and libraries still receive formal challenges to remove books from library shelves or nix them from reading lists to protect children from material that some see as inappropriate . `` A Bad Boy Can Be Good for a Girl '' by Dav Pilkey 's appears for first time on list . List of challenges compiled as part of Banned Books Week .
Dav Pilkey 's `` Captain Underpants '' series tops list of most challenged books again . Toni Morrison , Toni Morrison and Tanya Lee Stone are other repeat authors on top two list . `` A Bad Boy Can Be Good for a Girl '' by Dav Pilkey 's appears for first time on list . List of challenges compiled as part of Banned Books Week .