Controversial literature refers to written works that provoke strong reactions due to their themes, ideas, or representations. These texts often challenge societal norms, question established beliefs, or address sensitive topics such as race, gender, or politics. The discussions they generate can lead to debates about censorship, freedom of expression, and the role of literature in society. Examples of controversial literature include Mark Twain's "The Adventures of Huckleberry Finn," which addresses issues of racism, and J.D. Salinger's "The Catcher in the Rye," which explores themes of alienation and rebellion. Such works can be both celebrated for their boldness and criticized for their content, reflecting the complexities of human experience.