{"title": "The Underground Railroad", "subtitle": "From Slavery To Freedom", "authors": [{"key": "/authors/OL2746566A"}], "publish_date": "June 1, 2007", "publishers": ["Kessinger Publishing, LLC"], "weight": "1.8 pounds", "covers": [1859864], "physical_format": "Paperback", "contributions": ["Albert Bushnell Hart (Introduction)"], "subjects": ["United States - General", "History", "History: American"], "isbn_13": ["9781432664824"], "languages": [{"key": "/languages/eng"}], "isbn_10": ["1432664824"], "oclc_numbers": ["156829471"], "type": {"key": "/type/edition"}, "physical_dimensions": "9 x 6 x 1.2 inches", "source_records": ["amazon:1432664824"], "key": "/books/OL9670541M", "number_of_pages": 548, "works": [{"key": "/works/OL8254257W"}], "latest_revision": 5, "revision": 5, "created": {"type": "/type/datetime", "value": "2008-04-30T09:38:13.731961"}, "last_modified": {"type": "/type/datetime", "value": "2026-01-29T06:42:58.235151"}}