{"identifiers": {"goodreads": ["2256404"], "librarything": ["2470535"]}, "title": "Walden (Harper Classics)", "authors": [{"key": "/authors/OL19690A"}], "publish_date": "March 1994", "publishers": ["HarperCollins Publishers"], "weight": "1.6 ounces", "physical_format": "Audio Cassette", "subjects": ["Classics", "Essays", "Literary", "Audio - Literature / Classics", "Unabridged Audio - Fiction/General", "Audiobooks", "Massachusetts", "Philosophy of nature", "Ponds", "Audio Adult: Books On Tape"], "isbn_13": ["9781559949125"], "languages": [{"key": "/languages/eng"}], "isbn_10": ["1559949120"], "oclc_numbers": ["30350735"], "type": {"key": "/type/edition"}, "physical_dimensions": "7.2 x 4.5 x 0.8 inches", "source_records": ["amazon:1559949120"], "key": "/books/OL12096762M", "works": [{"key": "/works/OL55649W"}], "latest_revision": 7, "revision": 7, "created": {"type": "/type/datetime", "value": "2008-04-30T20:50:18.033121"}, "last_modified": {"type": "/type/datetime", "value": "2025-12-19T04:47:32.696088"}}