This book may be an older version but the countries it covers are pretty amazing!  The territory covered is vast–nearly 2,500 miles down the coast and over 1,000 miles inland, including not only Senegal, Nigeria, and the Democratic Republic of Congo but all or part of Benin, Burkina, Cameroon, Cape Verde, the Central African Republic, Chad, Congo, Côte d’Ivoire, Gabon, The Gambia, Ghana, Equatorial Guinea, Guinea, Guinea-Bissau, Ghana, Liberia, Mali, Mauritania, Niger, Príncipe, São Tomé, Sierra Leone, and Togo.

This is my affiliate link, if you use it to purchase this book or any other on Amazon I will get a small commission at no added cost to you.  Thank you for your support!