If you are the founder and managing director of the No. 1 Ladies' Detective Agency, you may expect complete strangers to approach you with their problems when they see you having dinner with your husband in a peri-peri restaurant. And if you are Precious Ramotswe, you are a kind and helpful person who will be willing to take on a quest to find the relatives of a man who, many years ago, left the country for the uncertainties and dangers of a distant...