Yann Martell's Life of Pi has been a constant on the independent lists over the last month. Sales of the Montreal-based author's novel were given a boost when he copped the Booker Prize in October. The book is also currently tracking in the top-25 at the national chains; it's #21 on PW's fiction list. The esteemed Booker often does more for pushing U.S. sales than does the NBA (so far its fiction winner, Three Junes by Julie Glass, has not shown up on the charts). Pi was published last May by Harcourt with a 20,000 first printing. Since then, the figure has gone up to 140,000 after 12 additional trips to press. After winning the prize, the author got a lot of media attention, with major coverage in the Washington Post, the New York Times, Time and Entertainment Weekly. Martell visited the States for a few days after winning the Booker, and in the last month his globe-trotting has included Berlin and Ireland. Next stop is Athens for the launch of the book there. He has done a taping for Charlie Rose, scheduled to air this month, and an interview on NPR's Weekend Edition Saturday to air December 14.