Citing the growth in popularity of the EPub format and a decline in demand for other e-book formats, Barnes & Noble is shutting down its e-book retailing site and its affiliated sites effective December 4. Originally founded by Scott and Stephen Pendergast in 2001, the former independent e-book retailer was sold to B&N in 2009.

B&N is shutting down as well as its affiliated sites, and A pioneering e-book retailer, offered e-books in a wide variety of formats including Mobipocket, Palm OS, MSReader, eReaderPro and others. In a FAQ page on the Fictionwise site, the company cites a decline in demand for other e-book formats and rise in demand for EPub, the e-book standard developed by the IDPF and offered through Fictionwise’s parent company Barnes & Noble.

The Fictionwise FAQ provides information for consumers about how to download any e-books still in their accounts.