Barnes & Noble reported fourth quarter and full year earnings Tuesday morning, and the results show even more clearly the divide between the company’s burgeoning digital growth and its still-declining brick & mortar business. For the year, sales rose 20 percent to just under $7 billion, a company record. The marked increase in sales owed to a huge jump at BN.com (with sales up 65 percent to $858 million) and the inclusion of a full year of sales from BN College, which reported full-year sales of $1.8 billion. Superstore comps were up 0.7 percent for the year because of digital, […]