- Barnes & Noble is the largest book retailer in the world, with over $5 billion in annual sales across its 4,648 stores and online business. However, it faces challenges from low profit margins, competition from Amazon and big-box retailers, and a mature print book market threatened by e-books. - To address these challenges, Barnes & Noble focuses on expanding its market share through acquisitions and large superstore formats. It also aims to grow its in-house publishing business and brand itself as a community gathering place through in-store events. However, delays in responding to e-books and digital competitors like Amazon may threaten its future success.