For one of the few times this year, August gains in bookstore sales outpaced increases posted by the entire retail segment. According to preliminary estimates from the Census Bureau, bookstore sales rose 5.4% in August, helped no doubt by solid sales in college bookstores. Sales for all of retail were flat. For the first eight months of the year, bookstore sales were up 2.4%, to $11.24 billion, while the entire retail segment had a 2.8% increase.