The Pru Barnes & Noble says a rent dispute means it's closing June 19th:
We were unable to reach an agreement with our landlord to keep this location open. We have truly enjoyed serving our customers & our community for the past 20 years!
The store points customers to Barnes & Noble outlets in, well, Hingham and Peabody, neither exactly convenient to Pru shoppers. Barnes & Noble does run bookstores Emerson College down Boylston and for BU out near Agganis Arena, though.