"Morality For Beautiful Girls" by Alexander McCall Smith (Preowned Paperback)

No. 1 Ladies' Detective Agency #3

Botswana PI Precious Ramotswe investigates the alleged poisoning of the brother of an important government official, and the moral character of four beauty contestants. When her business has money trouble, and problems arise at at her reliable fiance Mr J.L.B. Matekoni's Speedy Motors, she finds he is more complicated then he seems.