If you’re feeling the need for some historical background on the country from which our first set of authors hail, Falola Toyin’s History of Nigeria (Greenwood 1999) is a decent volume. Available at the library, as of this posting. Andrew Apter’s The Pan-African Nation: Oil and the Spectacle of Culture in Nigeria is excellent. The last two chapters contain a fascinating analysis of 419 scams, state corruption, and the legacies of the colonial state for petroculture in contemporary Nigeria. I have this checked out from the library; let me know if you need it, and I’ll either check it back in for you or scan any chapters you’re interested in.
Edited: Apter is available as an e-book!