Harper Lee uses many literary devices throughout To Kill a Mockingbird. On pages eight and nine, Lee describes the Radleys' yard, personifying the picket fence in this line: "The remains of a picket drunkenly guarded the front yard..." This helps the reader imagine what the fence must have looked like. Obviously part of it was missing, and the rest was all askew like someone who had had too much to drink.
Later, on page 72, Lee uses a simile to describe the smoke from the fire burning Miss Maudie's house. "Smoke was rolling off our house and Miss Rachel's house like fog off a riverbank..." The author compares the movement of the smoke with that of fog along a river.
You can find all types of figurative language from anaphora to metaphors and symbolism in To Kill a Mockingbird if you read closely.