The Return: Nightfall (The Vampire Diaries #5)

One week after Elena Gilbert has come back from the dead, she is in a childlike state, unable to read and almost completely unable to speak. Her understanding is impaired but not completely absent. Damon Salvatore watches outside Caroline's window as Caroline talks to an independent image of herself. Damon believes the mirror-Caroline to be a supernatural evil force that is playing some sort of trick on Caroline. He feels a sharp puncture on his neck while he watches. After the mirror-Caroline goes away, Damon persuades Caroline to let him into her bedroom. Stefan allows Elena's friends to visit her, including Caroline. When the four humans show up at Stefan's room in the boarding house Elena does not recognize any of them. She kisses Caroline, Bonnie, Matt and Meredith so she can recognize them...