Complex sentence: The Manse is open seasonally for guided tours given by the Trustees of Reservations who also run a book store in the house specializing in the American Revolution, Women's History, Nathaniel Hawthorne, Transcendentalism, and Sustainability.
Split into simpler sentences: The Manse is open seasonally for guided tours given by the Trustees of Reservations. The on-site book store in the house specializes in the American Revolution, women's history, Nathaniel Hawthorne, Transcendentalism, and sustainability.