thrillers, science writers, social commentators like colson whitehead and brad thor, brad metzer e gerald dean brooks and many others. their books have been read by millions around the country and the world. so if you are a reader, plan to join us for "in depth" on booktv. it's an interaboutive program the first sunday of every month that lets you call in and talk directly to your favorite authorities, and i -- authors, and it all kicks off january 7th at noon with david ignatius, author of ten national security thrillers. you can join us live on sunday is, january 7th, or watch it on demand at booktv.org. >> good evening, everyone. can everyone hear me well? good. i'm mary mclaughlin, program coordinator with the smithsonian associates, and i'd like to welcomeo you to what promises to be the very perfect halloween evening. [laughter] on the grisly world of vick vicn surgeon surgery. before we begin, i'd like to ask everyone the please check their cell phones and make sure they are