It is a matter of record that John Marshall Davis hung out with Stanley Anne Durnham's father, and may have become intimate with her, per references in one of Davis's writings, where he mentions the sexual interaction of him, his wife and a teenage girl named Anne.
vaudine
All that Obama contributed to those books was some of the historical facts of his life, the perspective and any ideology was an Ayers creation. Heck, Obama is an Ayers creation.