Hwang Sok-yong 
At Dusk [EPUB ebook] 

In the evening of his life, a wealthy man begins to wonder if he might have missed the point.Park Minwoo is a success story. Born into poverty in a miserable neighbourhood of Seoul, he has ridden the wave of development in his country. Now the director of a large architectural firm, his hard work and ambition have brought him triumph and satisfaction. But that all begins to change when he receives a message from a childhood friend he once loved. As memories return unbidden, he recalls a world he thought he had left behind a world he now realises that he has helped to destroy.