There's this book published early this year by a professor. It's titled "Economic Diversification in Nigeria". The book details certain political underhand in the building of a Post-Oil Economy in Nigeria.
The author, Zainab Usman, is of the northern Nigeria extract. And I think she spoke some frank truth about the economic strength pertaining to each composite regions and the factors that contributed to these economic and political realities.

Anyone interested in its pdf can DM.