What is the title of Harper Lee's most famous novel?

Harper Lee's most famous novel is "To Kill a Mockingbird." This work, published in 1960, has become a classic of modern American literature and is renowned for its themes of racial injustice, moral growth, and compassion. The story, narrated by a young girl named Scout Finch, is set in the Depression-era South and explores the complexities of human behavior through the lens of childhood innocence. The title refers to the moral lesson that it is a sin to kill a mockingbird, which symbolizes innocence and the idea of harming those who do no wrong—an underlying message throughout the novel. This literary significance and its impact on American culture and society have solidified its status as Harper Lee's most acclaimed work, differentiating it from the other options, which are by different authors and have distinct themes.