Before Amazon challenged Barnes & Noble the brick-and-mortar bookseller was one of the most prolific American chains during the twentieth century. This holiday season could be the most crucial one of Barnes & Noble's history. Its sales have been in a decline for six years as the bookseller cedes market share to Amazon and consumers turn to their phones or portable tablets instead of books. There's been a revolving door in the retailer's C-suite, and activist investors have piled on. Now, Barnes & Noble is considering a sale of its business after receiving interest from a handful of parties, including its so-called modern-day founder and executive chairman, Leonard Riggio, and reportedly, U.K. retailer W.H. Smith.