The River and the Dream — Raymond F. Jones

All his life Manvar has had a dream. One day, he will escape the harshly primitive, blizzard-torn lands of the north. He will follow the paths of the Ancients and see for himself the fabled lands of the south: lands without ice and snow and perpetual night; lands of warmth and light, where life is easy and comfortable within walled cities of incredible beauty. Manvar follows his dream, but finds it hollow. Life in the wondrous city of Delphos is not the paradise it seemed.