Lumen

Lumen, written by Camille Flammarion in the late 19th century, is a philosophical science fiction novel that explores themes of life, death, and the afterlife through mystical dialogues between Lumen, who has transcended earthly existence, and his friend Quærens. The narrative delves into metaphysical concepts, suggesting that death is not an end but a transition to a higher state of awareness, where the soul can traverse dimensions of time and space. This work is notable for its profound inquiries into the nature of existence and personal identity, making it a significant contribution to philosophical literature.