All the classics come to mind: Lord of the Rings, The Picture of Dorian Gray, Goethes Faust, the devine Comedy, several stories of Lovecraft…
But one story lingers in me for years. A book, totally forgotten by society. A book that changed my life and my way to think and judge things.
The legacy of Gonzalo Porras (In German: das Vermächtnis des Gonzalo Porras) by Claudia Gudelius.
It's about the real life events of a Spanish man in the age of wars against the Incas in the new world. A man who lost his voice through an injury when he was a child and since tried to find his identity. A life riddled by war and misjudgement.
I deeply recommend it.