mount vernon on christmas eve. i did another on the battle of the bulge, eleven days in december, that was a wartime christmas and still a fourth called "general sherman's christmas and the capture of savannah in the civil war." >> what is it about christmas? what is it about christmas? >> it's a remarkable time for families, and it was a remarkable time in our history over the years. i hope this will be my last christmas book. >> pearl harbor christmas: a world at war, december 1941, is the name of the book. historian stanley weintraub is the author. >> next, professor sanford levinson sat down with booktv to talk about his book, "constitutional faith," in which he argues that the u.s. constitution is worshiped to a degree that is unhealthy for our democracy. this interview is part of booktv's college series. this week we're at the university of texas at austin. >> host: and you're watching booktv on c-span2, 48 hours of nonfiction books every weekend. and we are on the campus of the university of texas in austin as part of our university series here on booktv, and we're pleased to be joined by sanford levinson who is a professor of law here at the uni