This is a relatively good account of the "toffs 'n' mercenaries" in Africa story of a few years ago. It's also a pretty much a straight telling of the characters, history, lead up and aftermath of the events with a tiny splodge of socio-economic facts and figures and a brief insight into the general corruption that exists in Africa (more often than not as a direct result of Big Business).
Although some of the writing occasionally feels strangled in its attempts to connect the various disparate elements and in trying to create an "exciting" feel with regards to the details of the coup (Roberts is certainly no thriller writer....he works for The Economist)...this is a fascinating insight into a world in which you would have thought no longer existed.