Katrina Vanden Heuvel in conversation (Jan 14, 2011 broadcast)

From http://en.wikipedia.org/wiki/Katrina_vanden_Heuvel: Katrina vanden Heuvel is the editor, publisher, and part-owner of the magazine The Nation. 

Amy Sedaris in conversation (Jan 9, 2011 broadcast)

From http://en.wikipedia.org/wiki/Amy_Sedaris: Amy Sedaris is an American actress, author, and comedian. She is known for playing the character Jerri Blank in the Comedy Central television series Strangers with Candy. Sedaris regularly collaborates with her older brother, humorist and author David Sedaris. She is a frequent guest on The Late Show with David Letterman.

Nicole Krauss in conversation (Dec 26, 2010 broadcast)

From http://en.wikipedia.org/wiki/Nicole_Krauss:  Nicole Krauss (born January 1, 1974) is an American author best known for her novels Man Walks into a Room (2002), The History of Love (2005) and, most recently, Great House (2010).