The Hunger Games by Suzanne Collins is written from the point of view of first person.  Collins tells the story completely from Katniss Everdeen's perspective.  The opening line:

"When I wake up, the other side of the bed is cold"  (3).

uses the personal pronoun 'I' to indicate that the reader will see the story unfold from a first person perspective.  A distinguishing factor of first person narratives is the narrator's use of personal pronouns to tell the story: 'I, we, us, me.  The advantage to this kind of perspective is that it puts the reader into a point of view that is as close to the action of the story as you can get; with a first person narrator, there is no sense of removal or detachment from the story.  Throungh Collins' character, Katniss Everdeen, the reader plunges into the action and brutality of the Hunger Games and experiences the violence and horror first hand.