TODAY ON OPRAH , BILL CLINTON WILL DISCUSS HIS NEW BOOK,

Giving: How Each of Us Can Change the World (Knopf, $24.95,

The former president and possible future First Lady is also appearing at noon at the Harlem Children's Zone, where he will speak on a panel moderated by Tavis Smiley that includes some of the people featured in Giving.

Tonight he'll be on the Late Show with David Letterman.

Author pic and quote from William J Clinton Foundation website.