I just (8/8) finished Graham Greene's The Honorary Consul. Starts slow, ends with a wallop!
What is love? What happens when someone can't or won't love?
It takes place in Argentine during the 1970s. the action is in a fictional border town across the Parana from a Paraguay ruled by a repressive dictator. The protagonist, who seems to have more trouble with the sixth commandment than with the ninth, finds the reality of love, the selfless giving of one's self for another, beyond his ken.