Karin Barber, Senior Lecturer at the Centre of West African Studies, the University of Birmingham, has published extensively on Yorùbá oral literature, religion, and popular culture. She worked and traveled with a Yorùbá theatre group in the early 1980s. John Collins is Head of Bokoor Recording Studio, Ghana, and Technical Director of a joint German/Ghanaian music archive redocumentation project at the Institute of African Studies, University of Ghana, Legon. His writings on African popular entertainment include Music Makers of West Africa and West African Pop Roots. Alain Ricard is Research Professor with the French National Center for Scientific Research (CNRS) of the African Studies Center of the University of Bordeaux, specializing in African languages and literatures, including drama and popular literature. He has written a number of books on African literature and has produced two films on concert parties.