It turns out Bill Ayers wrote one of Obama’s books. I forget which one ... but of course OBAMA claims credit for it.
It was Dreams From My Father, for which there is now a second source beyond the lengthy literary analysis from Csshill (in 3 parts at American Thinker). Andersen's just-published biography of Barack and Michelle says that Michelle got upset with how long it was taking Barack to get the book done (he had a large advance despite being an unknown and unpublished writer) and they took all the notes over to their good friend (and writing teacher) Bill Ayers and had him write it.
Of course politicians use ghost writers all the time, but they also usually give credit in their preface, if not on the cover jacket itself.
What makes Obama different is that the myth of Obama's "brilliance" is largely based on his authorship of Dreams, since apert from speech making and getting himself elected, he literally did nothing of significance in his life before becoming President.
The 2nd book, "The Audacity of Hope" is largely a re-write of Dreams with the more embarrassing parts left out and some added material of lesser literary flair.