"Elizabeth is Missing" is a novel by Emma Healey that follows the story of Maud, an elderly woman suffering from Alzheimer's disease. As her memory deteriorates, she becomes obsessed with finding her missing friend, Elizabeth, which leads her to confront her own past and the unresolved mystery of her sister, Sukey, who disappeared decades earlier. The narrative alternates between Maud's present-day struggles with memory loss and flashbacks to her childhood. This dual timeline highlights the impact of dementia on both the individual and their loved ones, while exploring themes of friendship, loss, and the importance of memory in shaping identity.