Dav Pilkey 's `` Captain Underpants '' series tops list of most challenged books again . 40 must-read titles to feed your YA book addiction . Sherman Alexie , Toni Morrison and John Green are other repeat authors on top 10 list . `` A Bad Boy Can Be Good for a Girl '' by Tanya Lee Stone appears for first time on list . Comment:
Dav Pilkey 's `` Captain Underpants '' series tops list of most challenged books again . Sherman Alexie , Toni Morrison and John Green are other repeat authors on top 10 list . `` A Bad Boy Can Be Good for a Girl '' by Tanya Lee Stone appears for first time on list . Comment: