Start with high-confidence west africa travel books, then narrow by subgenre or adjacent topics.
Journey Without Maps
Graham Greene
The Village of Waiting
George Packer
The Ends of the Earth
Robert D. Kaplan
Oxford Street, Accra
Ato Quayson
A Kind of Homecoming
E. R. Braithwaite
Looking for Transwonderland
Noo Saro-Wiwa
Senegal
Sean Connolly
Ghana
Philip Briggs
Lonely Planet West Africa 9 9th Ed.
Anthony Ham, Stuart Butler
Ghana - Culture Smart!
Ian Utley
Nigeria - Culture Smart!
Diane Lemieux