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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/9780525566724",
  "publisher": "Vintage",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
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  "cover_artists": [],
  "isbn": "978-05-2556-672-4",
  "pages": 128,
  "published": "2019-08-06",
  "language": "en_US",
  "cover": "https://quivercdn.com/covers/vintage/karl-marx/the-communist-manifesto_978-05-2556-672-4.jpg?v=2026-06-08%2010%3A43%3A10",
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  "markdown": "https://www.kolczanksiazek.pl/karl-marx/en/the-communist-manifesto/9780525566724.md",
  "binding": "Softcover",
  "description": "One of the most influential books ever written and an essential read for anyone seeking to understand the modern political landscape. The Communist Manifesto was first published in London in 1848 by two...",
  "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",
      "slug": "karl-marx",
      "url": "https://www.kolczanksiazek.pl/karl-marx"
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    {
      "name": "Friedrich Engels",
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