Stories are told from a point of view. In fiction this is either first-person, third-person, or narrative. The popular Choose Your Own Adventure series used the second-person point of view in their books, but this is a very rare exception. Some novels will use a single POV exclusively; other writers prefer to mix up the POV choice and employ multiple POVs in telling the whole story. All of these choices are valid from a technical and artistic standpoint; the writer who understands how each one affects the reader and limits his other choices will be able to them to best advantage.