Ken Follett’s historical novel ‘The Pillars of the Earth’ has faced bans and challenges in various places due to its explicit content. The book, which delves into the construction of a cathedral in the 12th century, includes graphic depictions of violence, sexual content, and themes of power and corruption. These elements have led some schools and libraries to remove it from their shelves, citing concerns over its appropriateness for younger readers. Despite these challenges, the novel has also been praised for its rich historical detail and compelling storytelling, making it a popular choice among readers interested in historical fiction.