Aways use the word 'Africa' or 'Darkness' or 'Safari' in your title. Subtitles may include the words 'Zanzibar', 'Masai', 'Zulu', 'Zambezi', 'Congo', 'Nile', 'Big', 'Sky', 'Shadow', 'Drum', 'Sun' or 'Bygone'. Also useful are words such as 'Guerrillas', 'Timeless', 'Primordial' and 'Tribal'. Note that 'People' means Africans who are not black, while 'The People' means black Africans.
Never have a picture of a well-adjusted African on the cover of your book, or in it, unless that African has won the Nobel Prize. An AK-47, prominent ribs, naked breasts: use these. If you must include an African, make sure you get one in Masai or Zulu or Dogon dress.
In your text, treat Africa as if it were one country. It is hot and dusty with rolling grasslands and huge herds of animals and tall, thin people who are starving. Or it is hot and steamy with very short people who eat primates. Don't get bogged down with precise descriptions. Africa is big: fifty-four countries, 900 million people who are too busy starving and dying and warring and emigrating to read your book. The continent is full of deserts, jungles, highlands, savannahs and many other things, but your reader doesn't care about all that, so keep your descriptions romantic and evocative and unparticular.
Make sure you show how Africans have music and rhythm deep in their souls, and eat things no other humans eat. Do not mention rice and beef and wheat; monkey-brain is an African's cuisine of choice, along with goat, snake, worms and grubs and all manner of game meat. Make sure you show that you are able to eat such food without flinching, and describe how you learn to enjoy it—because you care.
At the very least, this would allow one to write a decent installment of Indiana Jones, no?