What is the author's style in The Adventures of Tom Sawyer by Mark Twain?

The novel's narration is third person, limited omniscient, with Tom Sawyer as the central consciousness. This means that the story is told about Tom's world and is particularly focused on him by a narrator who is able to understand the motivations and feelings of some of the characters. This point of view earns the reader's amused admiration of an unlikely hero. Tom is a mischievous boy, an orphan, who cares nothing for school or church or any other polite social conventions but instead spends most of his time pretending that he is a pirate or a robber, sneaking out his window at midnight to have secret adventures with his friends in places like cemeteries, and entirely likely to have in his possession objects like dead cats.