Is Africa a linguistic area (Heine & Leyew 2008)? The present volume consists of sixteen papers highlighting the linguistic geography of Africa, covering, in particular, southern Africa with its Khoisan languages. A wide range of phenomena are discussed to give an overview of the pattern of social, cultural, and linguistic interaction that characterizes Africa's linguistic geography. Most contributors to the volume discuss language contact and areal diffusion in Africa, although some demonstrate, with examples from non-African linguistic data, including Amazonian and European languages, how language contact may lead to structural convergence. Others investigate contact phenomena in social-cultural behavior. The volume makes a large contribution toward bringing generalized theory to data-oriented discussions. It is intended to stimulate further research on contact phenomena in Africa.