"Siddhartha" by Hermann Hesse is a novel published in 1922 that follows a young Brahmin's spiritual quest for enlightenment in ancient India during the time of the Buddha. Rejecting both ascetic extremes and worldly pleasures, Siddhartha embarks on his own path of self-discovery, encountering love, wealth, suffering, and loss. Through these experiences and the wisdom of a humble ferryman beside a mystical river, he seeks to transcend time and understand the complete unity of all existence.