Grimus

After drinking a mysterious fluid that grants him immortality, the young Axona man Flapping Eagle sets out on a centuries-long search for his vanished sister, drifting through identities and eras as the decades pass without aging him. The trail eventually leads him to a hidden dimension reachable through the Mediterranean, and to Calf Island, a refuge for immortals who have grown weary of endless life but cannot bring themselves to give it up, ruled by a strange and rigid order all its own. Salman Rushdie's first novel, an early, genre-inflected departure from the realism of his later, more famous work.