question, what territory did america buy from france in 1803. this week's book of the week is only 81 pages long, but filled with insight and intelligence, if you have ever wanted to understand physics better, read carlo robeli's masterful book, seven brief lessons on science. he talks about science with an elegance and clarity. it's 81 pages, but you will probably find yourself coming back to it again and again. and don't forget to subscribe to our gps podcast. if you haven't already, go to wherever you find your favorite podcasts, just hit fareed zakaria and hit the subscribe button, and that may you will never miss a show. the answer to my first gps challenge question was c, there