use the search box at top of the page to look for arthur herman or the title of his book, "the viking heart." >> and you've been watching booktv. every sunday on c-span2 watch nonfiction authors discuss their books. television for serious readers. and watch them all online anytime at booktv.org. you can also find us on twitter, facebook and youtube @booktv. ♪ >> weekends on c-span2 are an intellectual feast. every saturday american history tv documents america's stories. and on season sundays book -- on sundays, booktv brings you the latest nonfiction books and authors. funding from c-span2 comes from these television companies and including com item cast. >> are you thinking this is just a community center? no, it's way more than that. >> com cast is partnering with -- >> comcast, along with these television companies, supports c-span2 as a public service. ..