Harry Potter series — J.K. Rowling

The Harry Potter series became the most challenged book series in American libraries in the first decade of the 21st century, with over 500 complaints to the American Library Association. The grounds: allegations of promoting witchcraft, the occult, and anti-Christian values. The series being the most widely read fiction of the 2000s while also being its most challenged illustrates how mainstream reading and book challenges operate simultaneously.