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    "name": "Kołczan Książek",
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    "url": "https://www.kolczanksiazek.pl"
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  "formats": "Każda podstrona ma dwie wersje z tymi samymi danymi: JSON (adres strony + .json) i markdown (adres strony + .md). Do każdego `url` w tym dokumencie można dopisać .json albo .md.",
  "title": "Journey to the Center of the Earth",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/jules-verne/en/journey-to-the-center-of-the-earth/9780451532152",
  "publisher": "Signet",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "978-04-5153-215-2",
  "pages": 320,
  "published": "2012-06-05",
  "language": "en_US",
  "cover": "https://quivercdn.com/covers/signet/jules-verne/journey-to-the-center-of-the-earth_978-04-5153-215-2.jpg?v=2026-06-15%2019%3A58%3A31",
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  "markdown": "https://www.kolczanksiazek.pl/jules-verne/en/journey-to-the-center-of-the-earth/9780451532152.md",
  "binding": "Softcover",
  "description": "From the discovery of a strange parchment in an old bookseller’s shop to the fantastic descent through a dormant volcano into a subterranean world of danger and beauty, A Journey to the Center of...",
  "book": {
    "title": "Journey to the Center of the Earth",
    "slug": "journey-to-the-center-of-the-earth",
    "url": "https://www.kolczanksiazek.pl/jules-verne/en/journey-to-the-center-of-the-earth"
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  "authors": [
    {
      "name": "Júlio Verne",
      "slug": "jules-verne",
      "url": "https://www.kolczanksiazek.pl/jules-verne"
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    {
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    {
      "name": "Leonard Nimoy",
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