As I said early, every story deals with the process of assimilation of immigrants into the local culture. The book is designed in such a way that each story gives you a little more insight into the turbulent life of immigrant Indians in US. The book start with the title story of a widower father coming to meet his daughter who is married to an American. She finds out that her orthodox father has considerably changed for good. There is another story that has a similar plot, named Only Goodness, but with a sad ending, of an alcoholic brother coming to meet his married sister, who in the first place had introduced drinks to him.
Nobody's Business deals with a man falling in love with an Indian girl, who is his housemate, but can only watch her falling in a destructive relation with another man of doubtful intents. Hell Heaven is about the relation between a student and a married woman who helps him in the unknown country. In the story titled A Choice of Accommodations, a Bengali- American man goes to his high school crush's wedding with his American wife and gets into some severely unpleasant situations.
In the end there are three stories that are connected together as a sad love story, but are equally convincing as standalone reads too. Here, each story- Once in A Lifetime, Year's end and Going Ashore is told from the view point of either of the one protagonists, as if speaking to the other person.
If you need an emotionally satisfying light read, I would recommend trying Unaccustomed earth by Jhumpa Lahiri.