Instruments of Darkness — Robert Wilson

Meet British expatriate Bruce Medway, a “fixer” for traders in an unwelcoming part of Africa once known as the White Man's Grave. Medway's work is tough, but never life-threatening … until he crosses paths with the mighty Madame Severnou. And the situation becomes even stickier when his is called to search for Steven Kershaw, a missing fellow expat.
Against the backdrop of political disruption and endemic official corruption, Medway learns that nothing in Africa is what it seems and that those who seek the truth find out more than they wish to know.