The novel is renowned for its warmth and humor, despite dealing with the serious issues of rape and racial inequality. The narrator's father, Atticus Finch, has served as a moral hero for many readers and as a model of integrity for lawyers. One critic explains the novel's impact by writing, "In the twentieth century, To Kill a Mockingbird is probably the most widely read book dealing with race in America, and its protagonist, Atticus Finch, the most enduring fictional image of racial heroism."
As a Southern Gothic novel and a Bildungsroman, the primary themes of To Kill a Mockingbird involve racial injustice and the destruction of innocence. Scholars have noted that Lee also addresses issues of class, courage, compassion, and gender roles in the American Deep South. The book is widely taught in schools in English-speaking countries with lessons that emphasize tolerance and decry prejudice. Despite its themes, To Kill a Mockingbird has been subject to campaigns for removal from public classrooms, often challenged for its use of racial epithets.
Reception to the novel varied widely upon publication. Literary analysis of it is considerably sparse compared to the number of copies sold and its use in education. Author Mary McDonough Murphy, who collected individual impressions of the book by several authors and public figures, calls To Kill a Mockingbird "an astonishing phenomenon".In 2006, British librarians ranked the book ahead of the Bible as one "every adult should read before they die". It was adapted into an Oscar-winning film in 1962 by director Robert Mulligan, with a screenplay by Horton