cathy o'neil and tim wu are with us today. en immateri ai'm excited to tele about them and i want to know, i promise you, these are books you'll want to purchase and i promise you, these are books you'll want to purchase if you want to do that, leaving the building turning left. the table at barnes & noble, you'll be able to have a signed copy by the author. if you have questions, keep in mind until we get to the q & a. and we're going to win with a mathematician, data scientist, author, bloomberg view columnist, "weapons of math destruction, how big data inequality and threatens democracy". cathy, we'll begin with you, tell us about your book. >> great, thanks everyone for coming, it's super exciting and my favorite part is talking with people about the questions that come up around big date an and there's been a doozy of a week or the last two weeks, wow, a lot to talk about. from date an algorithms to facebook ads. my book is sort about the algorithms that we need to talk about. i call them the worst algorithms, weapons of

live from the brooklyn book festival, it's nominated author cathy o'neil and law professor tim wu, on collection of data and how it's being used