Christopher Potter is a former mathematician who went on a commission to edit some works which are the most popular science books of the past decades like Dava Sobel's Longtitude, Fermat's Last Theorem by Simon Singh and fictions by celebrated novelist like Annie Proulx and Carol Shields. And now Potter shares all thing that he have learned from the most popular science book of all time and put it together into his own book entitled "You Are Here - A Portable History of the Universe".