Barnes and Noble
Barnes and Noble is a bookseller and publisher of both hardcopy books and eBooks. They own Barnes and Noble.com as well as Fictionwise and eReader. They also produce their own eBook Readers called nook, replaced with the nook touch, and nook color.
They have a large chain of brick and mortar stores and connected coffee shops. They are the largest book retailer in the USA. You can read any eBook for free for 1 hour per day while in their store using a Nook eBook Reader.
Their corporate web site is http://www.barnesandnobleinc.com/
 nook OS
 Publishing with Barnes and Noble
They supply a program called Pubit to generate an eBook for publishing at Barnes and Noble. There is documentation available on the requirements as well.