In addition to that work in which Dr. Godspeak is overthrown by Alaba, he wrote a work in which the protagonist's wife is seduced by his twin brother and his farm is destroyed by a flood, leading him to confront the Priest of the Serpent.  
In one of this man's works, a servant takes up the role of a reincarnation of Nostradamus after usurping the position of the title character by convincing him that he himself is dead.  In addition to that work in which Dr. Godspeak is overthrown by Alaba, he wrote a work in which the protagonist's wife is seduced by his twin brother and his farm is destroyed by a flood, leading him to confront the Priest of the Serpent.  This author of Requiem for a Futurologist who wrote about the Kadiye and Igwezu in The Swamp Dwellers wrote a work in which Segi and Daodu lead a rebellion against the titular president, as well as one in which a village chief feigns impotence in order to seduce a village girl as she celebrates with his wife Sadiku.  FTP, name this playwright of Kongi's Harvest who wrote of the schoolteacher Lakunle's delusional love for Sidi in The Lion and the Jewel.
In one of this man's works, a servant takes up the role of a reincarnation of Nostradamus after usurping the position of the title character by convincing him that he himself is dead.  
Wole Soyinka