The Eight Zulu Kings: From Shaka to Goodwill Zwelithini

I would give this a 4 for depth and breadth of information and the quantity of native words. It seems like a very good book if you're already have some familiarity with the people and their culture and are looking to dive in a bit more.

I give it a 3 because the book is more scholarly than I would prefer for an introduction to the people.