The Last Man, all three volumes

According to Wikipedia: "The Last Man is an apocalyptic science fiction novel by Mary Shelley, which was first published in 1826. The book tells of a future world that has been ravaged by a plague. The novel was harshly reviewed at the time, and was virtually unknown until a scholarly revival beginning in the 1960s. It is notable in part for its semi-biographical portraits of Romantic figures in Shelley's circle, particularly Shelley's late husband Percy Bysshe Shelley and Lord Byron."