mobile_carrot:
One hardly ever writes in the second person except in instructions, advertising, role-play games, etc. I suppose it could be used in BDSM-type stories where the writer effectively becomes passive and focuses on the other person and what they said and did - "You came through the door, your body encased in black leather. You pointed imperiously to the bed and said ..." etc, etc. I've never seen a whole novel writen this way but I suppose there are some!
I have seen short stories and long but not novel length stories (what are sometimes called novelettes, more than say 15,000 words and short of say 30,000) written in the second person. I don't recall a novel so written, but it could be done. Usually, in my opnion, this is merely a gimmick, the story is effectivly a first-person one, simply substituting "you" for "I".
Occasionally second person is used to imply a narrator just off-stage in some special way. Particularly, I have seen it used where the PoV character is in some sort of odd mental state, and the narrative voice is that of the character in a different state, a narrator who does not see the PoV character as "self" in spite of being, in some way, "the same person". For example, in Ted Sturgeon's short story "THe Man Who Lost the Sea" second person is used to obscure the relation between the central character (who is not thinking clearly) and the narrative voice until the climax, where the author makes everything clear.