The Telegraph UK is reporting that Davis, a close friend of Obama's mother and his maternal grandfather, published an autobiographical, pornographic book, "Sex Rebel:Black," under the pseudonym "Bob Greene."

Marshall admitted to having written the book, which he said describes factual sexual encounters that he and his wife had with minors and other couples. "I could not then truthfully deny that this book, which came out in 1968 as a Greenleaf Classic, was mine," said Davis. The Telegraph states that, "In the introduction to Sex Rebel, Davis explains that although he has "changed names and identities...all incidents I have described have been taken from actual experiences."

Marshall's book describes, in lurid detail, his sexual encounters, including multiple group encounters with his wife and a 13 year old girl: "I'm not one to go in for Lolitas. Usually I'd rather not bed a babe under 20. But there are exceptions. I didn't want to disappoint the trusting child. At her still-impressionistic age, a rejection might be traumatic, could even cripple her sexually for life."

Davis described how the encounters with the child, who he called "Anne," would materialize: "Anne came up many times the next several weeks, her aunt thinking she was in good hands. Actually she was. She obtained a course in practical sex from experienced and considerate practitioners rather than from ignorant insensitive neophytes....I think we did her a favour, although the pleasure was mutual."