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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": "The Communist Manifesto",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/karl-marx/en/the-communist-manifesto/9780143037514",
  "publisher": "Penguin Books",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
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  "cover_artists": [],
  "isbn": "978-01-4303-751-4",
  "pages": 128,
  "published": "2006-05-30",
  "language": "en_US",
  "cover": "https://quivercdn.com/covers/penguin-books/friedrich-engels/the-communist-manifesto_978-01-4303-751-4.jpg?v=2026-06-20%2023%3A18%3A53",
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  "markdown": "https://www.kolczanksiazek.pl/karl-marx/en/the-communist-manifesto/9780143037514.md",
  "binding": "Softcover",
  "description": "The perfect books for the true book lover, Penguin's Great Ideas series features twelve more groundbreaking works by some of history's most prodigious thinkers. Each volume is beautifully packaged with...",
  "book": {
    "title": "The Communist Manifesto",
    "slug": "the-communist-manifesto",
    "url": "https://www.kolczanksiazek.pl/karl-marx/en/the-communist-manifesto"
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  "authors": [
    {
      "name": "Karl Marx",
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      "url": "https://www.kolczanksiazek.pl/karl-marx"
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    {
      "name": "Friedrich Engels",
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      "url": "https://www.kolczanksiazek.pl/friedrich-engels"
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