There are several books that have challenged prevailing beliefs and societal norms, sparking debates that endure for generations. Themes of teenage alienation, obsession, explicit content, religious blasphemy, extreme ideologies, sensitive topics and harsh portrayal of societal injustice sets them apart from the romantics and others. While some face bans and trials others at times incite violence and harm. Despite the controversies, their societal impact and exploration of complex issues continue to make them prevalent selections in literature. Here we list 7 books that were termed controversial.