Who is the narrator, can she or he read minds, and, more importantly, can we trust her or him?
First Person (Central Narrator)
Meet Huck—or, as you introduces himself, "You don't know about me without you have read a book by the name of The Adventures of Tom Sawyer; but that ain't no matter" (1.10).
So, we know right away that we're getting a first-person narrator, and it's a real first person, full of Huck's personality and viewpoint and youthful voice. Because everything is filtered through Huck, we have to rely on him to interpret the story and present it to us. This subjectivity means taking the narration with a grain of salt, but Huck's is so earnest and truthful with himself—and with us—that we're happy to take him at his word.