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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": "An Abundance of Katherines",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/john-green/en/an-abundance-of-katherines/9780142410707",
  "publisher": "Penguin Books",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
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  "isbn": "978-01-4241-070-7",
  "pages": 272,
  "published": "2008-10-16",
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  "markdown": "https://www.kolczanksiazek.pl/john-green/en/an-abundance-of-katherines/9780142410707.md",
  "binding": "Softcover",
  "description": "From the #1 bestselling author of Turtles All the Way Down and The Fault in Our Stars Michael L. Printz Honor Book Los Angeles Times Book Prize Finalist New York Times Bestseller When it comes to...",
  "book": {
    "title": "An Abundance of Katherines",
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    "url": "https://www.kolczanksiazek.pl/john-green/en/an-abundance-of-katherines"
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  "authors": [
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      "name": "John Green",
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