laurie andrews as the title of your book suggests, you've raised concerns about privacy online. what concerns do you have about what google is doings? >> well,ing into at heart is an advertising platform. it makes 96% of its money, or $36 billion a year, by targeting ads. so this new policy allows them to target ads across platforms. so if i send an e-mail over gmail to a divorce lawyer and then i do a google search for depression, if i then am watching a youtube video with my... a young son, ads will pop up related to divorce and mental health which might trouble him. this private information of mine will become visible. anding intoed as erred in the past. in 2010 when young people went on google chat rooms to say "i'm thinking of committing suicide with x chemical" a google ad would pop up immediately saying "dial 1-800-blah blah, get that chemical two for one." so the algorithms may push us toward harmful behaviors. >> brown: well, markham erickson google would say this is a transparent system and a service to its customers. what's the best argument? >> frankly, the criticism