Two new books about the First Couple of the United States, President Barack Obama and First Lady Michelle Obama, both delve into the ancestors of the presidential couple. Barack Obama The Story by Washington Post reporter David Maraniss begins with Obama's great grandparents. American Tapestry The Story of the Black, White and Multiracial Ancestors of Michelle Obama by Rachel L. Swarns spans several generations of Mrs. Obama's family who were once enslaved. One connection the couple shares is their Irish roots and the fact that the ancestors of Barack Obama and Michelle Obama are a blend of black and white. For example, Mr. Maraniss notes that President Obama looks nothing like his African father but his physical features with the elongated face and big ears bear a striking resemblance to his Caucasian maternal grandfather, Stanley Dunham. In America Tapestry, author Swarns writes about the number of the First Lady's female ancestors that were slaves and forced to have sex with white men which, the author points out, was a common occurence during the slave-holding period in the South.