I only read the first few posts and saw that you ultimately decided to get the African geography book. My son and I are doing it this year and have absolutely loved it. It is difficult, as there are so many countries, but it is so wonderful to know. I’m learning so much myself as well! Definitely read the picture books that are recommended. They are often the most fun!
One thing that has helped us memorize the countries is to put them to music. It was completely random, but I have made the countries fit into the One Little, Two Little, Three Little Indians tune. I guess because that’s the same tune we use for the old testament books of the Bible! I just add them into the song as we learn new countries. It started off:
Egypt, Sudan, & Eritrea, Lybia, & Tunisia, Algeria and Morocco, Western Sahara…
Then start the tune over:
Gambia, Mauritania, Senegal, Guinea-Bissau, Mali, and then Guinea, Sierra-Leone, Liberia…
We seriously wouldn’t have been able to remember them all if it hadn’t been to song! Also, there is a great episode of Arthur in Season 10 (available on Amazon Prime and You Tube) called “In My Africa,” that sings about every nation in Africa! Great tricks and finds like that have made geography so fun and fruitful this year! Good luck!