After increasing by more than 5% in January, bookstore sales fell 3.6% in February, to $958 million, according to preliminary estimates released by the U.S. Census Bureau. Sales for the entire retail segment rose only 1% in the month. For the first two months of 2013, bookstore sales were up 2.4%, to $3.09 billion over 2012; sales for all of retail were up 3.2% in the two-month period.