Madame Koto's bar.
In a novel from this country, a family is lent rat poison by a man who photographs the burning of a van which had distributed vomitÂ­inducing powdered milk. In a novel from this country, the protagonist refuses to answer when his uncle questions him about a phrase meaning "Mother is Supreme." After boxing Green Leopard, the father of the protagonist of a novel from this country decides to beat the Party of the Rich,which patronizes (*) Madame Koto's bar. A novel from here depicts a girl being carried by a sleepwalking oracle and includes the story of a turtle who cracks his shell after attending a feast of the birds. The Famished Road is from this country, as is a novel whose protagonist hangs himself after decapitating a messenger of the district commissioner. For 10 points, name this modern country home to Okonkwo in Achebe's Things Fall Apart. 
In a novel from this country, a family is lent rat poison by a man who photographs the burning of a van which had distributed vomitÂ­inducing powdered milk.
Nigeria 