{
  "type": "edition",
  "site": {
    "name": "Kołczan Książek",
    "language": "pl-PL",
    "url": "https://www.kolczanksiazek.pl"
  },
  "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": "Relativity",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/albert-einstein/en/relativity/9780143039822",
  "publisher": "Penguin Classics",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "978-01-4303-982-2",
  "pages": 160,
  "published": "2006-07-25",
  "language": "en_US",
  "cover": "https://quivercdn.com/covers/penguin-classics/albert-einstein/relativity_978-01-4303-982-2.jpg?v=2026-06-20%2022%3A40%3A26",
  "json": "https://www.kolczanksiazek.pl/albert-einstein/en/relativity/9780143039822.json",
  "markdown": "https://www.kolczanksiazek.pl/albert-einstein/en/relativity/9780143039822.md",
  "binding": "Softcover",
  "description": "An accesible version of Einstein's masterpiece of theory, written by the genius himself According to Einstein himself, this book is intended \" to give an exact insight into the theory of Relativity to...",
  "book": {
    "title": "Relativity",
    "slug": "relativity",
    "url": "https://www.kolczanksiazek.pl/albert-einstein/en/relativity"
  },
  "authors": [
    {
      "name": "Albert Einstein",
      "slug": "albert-einstein",
      "url": "https://www.kolczanksiazek.pl/albert-einstein"
    }
  ]
}