number of other political books that should be dropping very soon. >> host: we've been talking with sarah weinman, new director or publishers marketplace. if your interested in following publishing news, the web site publishes mark plate.com and if you want to follow sarah on twitter, she is a constant twitterer, as sarah w, is that correct. >> guest: , that. >> sarahw. >>> i tried to keep it simple by getting on twitter early. so i was fortunate to have as few characters as possible so i could have 140 characters left to say what wanted to say. >> host: thank you for being on book tv. >> guest: thank you very much, peter, a pleasure as always. >> one of the most interesting aspects of the cell phone, some people solved the problems came from military work and one guy in particular i spent a lot of time talking to had done a lot of work on radar, discriminatory radar work in the south pacific, where bell had a lab, and at the time he came back from a tour of duty where he worked on a sophisticated microwith a system, kim back to bell labs and they were going to discontinue what he was doing, some