{"identifiers": {"librarything": ["1820681"]}, "title": "Secret Worlds", "subtitle": "Dinosaurs", "authors": [{"key": "/authors/OL2655350A"}], "publish_date": "September 1, 2001", "publishers": ["DK CHILDREN"], "weight": "9.6 ounces", "covers": [553344], "physical_format": "Hardcover", "ocaid": "secretworlds00dkpu", "subjects": ["Science & Technology - General", "Juvenile Nonfiction", "Children: Grades 4-6", "Children's 9-12 - Science", "Juvenile literature", "Animals - Dinosaurs", "Juvenile Nonfiction / Animals / Dinosaurs", "Children's", "Animals - Dinosaurs & Prehistoric Creatures", "History - Prehistoric", "Dinosaurs"], "edition_name": "1st edition", "languages": [{"key": "/languages/eng"}], "isbn_13": ["9780789479716"], "isbn_10": ["0789479710"], "oclc_numbers": ["48211370"], "type": {"key": "/type/edition"}, "physical_dimensions": "8.2 x 5.4 x 0.5 inches", "source_records": ["amazon:0789479710"], "key": "/books/OL8156284M", "number_of_pages": 96, "works": [{"key": "/works/OL7960550W"}], "latest_revision": 7, "revision": 7, "created": {"type": "/type/datetime", "value": "2008-04-29T15:03:11.581851"}, "last_modified": {"type": "/type/datetime", "value": "2026-01-31T03:00:21.010245"}}