The book business is good. At least good enough for superstore Barnes & Noble to earn $111 million profit in the fourth quarter of last year. But though that’s up 32 percent from the previous year, the company’s spin makes it seem like the company is barely getting by. “Barnes & Noble store sales were $1.2 billion for the quarter, an increase of 4 percent. Sales at stores open at least a year, known as same-store sales, fell 3 percent.”