If you haven't seen the interview then I would suggest taking a look at the book. In lieu of reviewing "Between the Lines" and Mr. Kibrick's interview with Austin Washington I offer a re-posting of my review of the book from February 22nd;
Get ready for the best book ever written about the Father of Our Country. What makes this book so special? It was written by his great nephew several times removed, Austin Washington. He is the direct descendant of one of George Washington’s brothers. He was even raised in one of the homes owned by the Washington family since colonial times. It was in the kitchen of that house where he first encountered the great man’s portrait; noticeably smaller than that of his 2 brothers; in the kitchen. The other 2 portraits were displayed more prominently elsewhere.
The change in the calendar from the old style to the new in the 1740’s make Washington’s Birthday even more complicated than the ubiquitous “President’s Day holiday, which changes every year to accommodate convenience. Washington was actually born on February 11th on the old calendar. When the change to the calendar came it added 11 days to his date of birth.