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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": "El origen de las especies",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/charles-darwin/es/el-origen-de-las-especies/9788491054047",
  "publisher": "Penguin Clasicos",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "978-84-9105-404-7",
  "pages": 680,
  "published": "2027-04-06",
  "language": "es_AR",
  "cover": "https://quivercdn.com/covers/penguin-clasicos/charles-darwin/el-origen-de-las-especies-the-origin-of-species_978-84-9105-404-7-752624f2.webp?v=2026-10-13%2000%3A57%3A58",
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  "binding": "Softcover",
  "description": "Buy El origen de las especies / The Origin of Species by Charles Darwin from Penguin Random House",
  "book": {
    "title": "El origen de las especies",
    "slug": "el-origen-de-las-especies",
    "url": "https://www.kolczanksiazek.pl/charles-darwin/es/el-origen-de-las-especies"
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  "authors": [
    {
      "name": "Charles Darwin",
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