{
  "metadata": {
    "title": "A Sample Book",
    "identifier": "urn:isbn:1234567890"
  },
  "links": [
    {
      "href": "https://example.org/book.epub",
      "type": "application/epub+zip",
      "rel": "http://opds-spec.org/acquisition"
    }
  ],
  "images": [
    {
      "href": "https://example.org/cover.jpg",
      "type": "image/jpeg"
    }
  ]
}
