Since 2008, the background of Frank Marshall Davis ("Frank" from Obama's "Dreams From My Father") has been severely misrepresented by propagandists seeking to implicate Barack Obama through guilt-by-association. A disinformation campaign against the Davis-Obama relationship circulated in the right-wing blogosphere, just as a disinformation campaign against Iraq preceded the 2003 invasion.
Contrary to this misrepresentation, numerous sources outline his career with much greater accuracy. They include:
http://www2.hawaii.edu/~aoude/pdf/12Takara.pdf (also posted here)
http://open.salon.com/blog/robert_kelley/2010/01/07/the_fundamental_transformation_of_america_with_commentary (debunking "The Fundamental Transformation of America" - also posted here)