Couldn't decide where the best place to post this was. I remember when I was in pre-GCSE English in the mid to late eighties, we studied a shortish book about a family with a son (the narrator) who was into Verdi and liked his life. They adopted a Vietnamese orphan - it was set either just after or maybe during the Vietnam war. I most clearly remember a scene where the orphan has diarrhoea and the boy goes off crossly to get his parents - and sees them sat together sharing a glass of wine and giggling, so he does the cleaning up to spare them. I have a vague sense the author even visited us - but I can remember nothing else! If anyone can identify it, I'll be very grateful! Thank you.