As writers and editors, we all learn that using first person point of view or even third person limited/close point of view gets readers closer to the story, because they are experiencing things as if they are standing in that character’s shoes.
But what happens if that narrator—the character through whose eyes we experience the story—is unreliable? What if that character is a pathological liar or a master manipulator? What if they believe what they say, but their view of the world is skewed?