Sleep Well, My Lady by Kwei Quartey

Almost a year ago Lady Araba, the head of a self-made fashion empire, was found murdered at her home in Trasacco Valley, the Beverly Hills of Accra. Her driver was arrested and continues to be held in custody, but the woman's favourite aunt, Dele, has always thought Araba's boyfriend was the real killer. Now Dele approaches Emma Djan, a young PI with a fast-growing reputation for getting results, to help find the truth.

From alleged suppressed evidence by the Ghana Police to unpleasant accusations involving Araba's parents, Djan's investigation will navigate a long list of suspects and she will discover that not only are they willing to lie for each other, but that one is still willing to kill.