Task: Text Categorization
Input (English): One of this man's novels features a disease in which the afflicted can only say "if and only if", as is the case with Titus and many others in Aburiria, while one of his plays ends with Thoni's suicide due to the eloping of her husband Remi, the title character. In addition to The Wizard of the Crow and The Black Hermit, this author also wrote a play in which the wedding between the son of Jezebel and Ahab Kioi and Gathoni forces the main character to sell his farm. Before writing I Will Marry When I Want, he wrote a novel in which Inspector Godfrey investigates the burning of the brothel of Ilmorog and another in which John Thompson catches the killer of Thomas Robson thanks to Mugo's betrayal. FTP, name this author of Petals of Blood and A Grain of Wheat, a Kenyan writer. 
Output (English): Literature