Joseph O. Vogel 
Great Zimbabwe [PDF ebook] 
The Iron Age of South Central Africa

First Published in 1994. This research guide was written as a comprehensive, though by no means exhaustive, survey of the literature pertinent to studying the indigenous complex societies of south central Africa. Although the paramount focus of the compilation was the archaeology of Great Zimbabwe, the author has drawn from a broad geographical area and a wider period of time than that usually associated with Zimbabwean culture in order to demonstrate the cultural background for the growth of monumental trading towns in south central Africa.