The title of To Kill a Mockingbirdrefers to the local belief, introduced early in the novel and referred to again later, that it is a sin to kill a mockingbird. Harper Lee is subtly implying that the townspeople are responsible for killing Tom Robinson, and that doing so was not only unjust and immoral, but sinful.
The events of To Kill a Mockingbird take place while Scout Finch, the novel’s narrator, is a young child. But the sophisticated vocabulary and sentence structure of the story indicate that Scout tells the story many years after the events described, when she has grown to adulthood.
To Kill a Mockingbirdis unusual because it is both an examination of racism and a bildungsroman. Within the framework of a coming-of-age story, Lee examines a very serious social problem. Lee seamlessly blends these two very different kinds of stories.