In The Autobiography of an Ex-Colored Man, when the narrator learns of his racial background, he begins to fervently read
poetry
slave narratives
romance novels
the Bible

the Bible

Explanation:

In The Autobiography of an Ex-Colored Man, the Narrator takes the reader through his life as he decides which race to live as between black and white as he was biracial born.

The day he found out that he was not white, he confronted his mother who confirmed it. After this he began to read a lot, starting with the Bible which he saw as important in both the black and white communities and would therefore help him in his racial discovery journey.

because each is self-sufficient.  

obama was told in early july 2004 that he was chosen to deliver the address, and he largely wrote the speech himself, with later edits from the kerry presidential campaign.