you have it on your kindle -- amazon kindle the whole relationship is i worry is changing to making it less easy to happen upon things to read and things to reflect on. >> host: professor, you touched on this but is being always on changing our human interaction? >> unfortunately, yes. i tell a story in the book that to me is very emblematic of the problems. it is about the amish in lancaster pennsylvania. an interview was done with the gentleman about the fact they do not allow telephones in their house. and these-- they do of -- do some business they may have some by the icebox why not? because if the phone takes precedence over a face-to-face relationship relationship, what kind of people do we become? that we care more about something that is not with us than the person that is? we see over and over again that you and i walking down the street chatting and your phone rings, you take the call or you get the buzz we know the other person feels left out. we know these devices have social problems. what could read do with the use devices whether computer are mobile phone or face book? you can block people. so with instant messaging if i don't want you to see

host: why 48? >> guest: we originally had 50, and then some overlapped. and then i began to think -- when you go on amazon, you see seven something, 50 something -- i need something where other books -- who does 48 of anything, right? but let me get back to roosevelt. this is another one that i think -- it starts on the list. that the amazing thing. starts with charlesed into charles hansen but in recent times it's gravitated to the right, and the idea was that roosevelt knew in advance about pearl harbor, he allows it to occur so we will get sucked into war. the fact is almost all the recent collars- -- scholars, specially a man by jacobson, they have shown that, a., various transmissions didn't get to us. b., they weren't translated or decrypted in any time that gave roosevelt any warning. and c., they weren't brought to his attention. we find for example that 80% of the crypts from 1941 did no go through the final phase where they were handed over as intelligence until 1944. so, it's things like that. i have my axes to grind with roosevelt but pearl harbor is not one of them. >> host: if you can't get

if you just go to amazon and put in ratification and bill of rights, i think you'd come up with probably the top ten scholarly books in a heartbeat. >> host: this is our monthly "in depth" program on booktv on c-span2. one author, his or her body of work. this month it's history professor larry schweikart. "a patriot's history of the u.s." came out in '04. "america's victories" in 2006. "48 liberal lies about american history," 2008. "seven events that made america america" was his next book. "american entrepreneur" also came out in 2010. "what would the found orers say: a patriot's answers to america's most pressing problems," 2011. the "the patriot's history reader," and "a patriot's history of the modern world," basically the first half of a two two-part series on that one. again, very quickly, why the use of "a patriot's history"? >> guest: the term was, first of all, to identify with the reader that this is not going to be a volume that bashes america. it's going to present an optimistic, pro-american approach to history. it doesn't mean we don't include warts. we have plenty of warts many there. but it's not going to be my country a

amazon host>> no, it's groupon today there are many sugar substitutes on the market. what is the name for the sugar alcohol sweetener used in sugar-free gum and mints? (timeout) xylitol which subset of the irrational numbers contains the numbers that are not the root of any examples include e and pi.oeffi, complex numbers host>> no, westmoor, you can steal. no answer host>> no, it's transcendental numbers its peace memorial includes the genbaku dome. what city in western honshu was the site of the first use of an atomic bomb? nick? hiroshima host>> right! its cathedral saw the 1488 dosbal?onspiracy. what city on florencer arno was ruled during host>> right!ce by the medici f, italy's po river flows into it. which arm of the mediterranean sea lies between croatia and italy? devin? adriatic host>> right! the term lunatic originated with the idea that blamed what heavenly body for crazy behavior? brandon? moon host>> right! that's the end of the game! and we'll see you here next week bye. um] ♪[tum] ♪[tum] ♪[tum] ♪[tum] ♪[tum] ♪[tum] [phone ring,] car brakes hard [phone