Because she really did not want her hometown, Nashville, to be without one. The Nashville metro area has 1.5 million people and would have had only specialty, used and religious bookstores, along with two Barnes and Noble branches in the suburbs and one Barnes and Noble college bookstore. That's a lot of people to be without an independent bookstore.
Advice to small bookstores:
Put the children’s section as far away from the front door as possible. Hang signs from the ceiling, and customers will buy whatever is advertised on them. And make your store comforting and inclusive, smart but not snobby.
NY Times article.
"Immersion in the life of the world, a willingness to be inhabited by and to speak for others, including those beyond the realm of the human, these are the practices not just of the bodhisattva but of the writer." --Jane Hirshfield