Imaro is a classic in the world of speculative fiction. Charles Saunders is on the level of Octavia Butler, and his book Imaro inspired the subgenre of Sword and Soul. Imaro is more than a Black Conan the Barbarian, and features a story of a hard hitting African warrior.
I suggest new readers start here. There are more books written in the Imaro tradition like Meji, Griots: Sisters of the Spear and the Rococoa anthology.