{"identifiers": {"goodreads": ["2593486"]}, "title": "Harcourt Science - National Version", "subtitle": "Grade 4", "authors": [{"key": "/authors/OL1455582A"}], "publish_date": "September 30, 2005", "publishers": ["Harcourt School"], "weight": "3.6 pounds", "languages": [{"key": "/languages/eng"}], "isbn_10": ["0153400633"], "isbn_13": ["9780153400636"], "covers": [5014279], "edition_name": "Student edition", "physical_format": "Hardcover", "type": {"key": "/type/edition"}, "subjects": ["Juvenile Nonfiction", "Children: Grades 4-6", "Science & Nature - General"], "physical_dimensions": "11 x 8.5 x 1.2 inches", "source_records": ["amazon:0153400633"], "key": "/books/OL9787742M", "works": [{"key": "/works/OL5898923W"}], "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2008-04-30T09:38:13.731961"}, "last_modified": {"type": "/type/datetime", "value": "2025-12-10T23:07:06.681751"}}