The Danger of a Single Story
https://www.ted.com/talks/chimamanda_ngozi_adichie_the_danger_of_a_single_story?language=en
The Question and Answer section for Half of a Yellow Sun is a great resource to ask questions, find answers, and discuss the novel.
Another pivotal theme that permeates this narrative is that of oppressive stereotyping within a society that, presumably, is becoming more modern. There are several characters who surrender to the Orientalist narrative that caricatures...
Half of a Yellow Sun is an example of historical fiction. The novel is based on historical events, but many of the characters and their experiences are fiction.
I'm sorry, you have not provided the extract in question.