BIRMINGHAM, Ala. — Reading into the Books-A-Million results, its easy to see how the liquidation at Borders took a toll on the book retailer's second quarter. Books-A-Million reported that net sales for its second quarter decreased 11.4% to $106.4 million from net sales of $120 million in the year-earlier period. Comparable-store sales for the second quarter declined 12.9% compared with the 13-week period in the prior year.