{
  "type": "book",
  "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": "Black Sabbath. U piekielnych bram",
  "subtitle": null,
  "slug": "black-sabbath-u-piekielnych-bram",
  "url": "https://www.kolczanksiazek.pl/mick-wall/black-sabbath-u-piekielnych-bram",
  "json": "https://www.kolczanksiazek.pl/mick-wall/black-sabbath-u-piekielnych-bram.json",
  "markdown": "https://www.kolczanksiazek.pl/mick-wall/black-sabbath-u-piekielnych-bram.md",
  "authors": [
    {
      "name": "Mick Wall",
      "slug": "mick-wall",
      "url": "https://www.kolczanksiazek.pl/mick-wall"
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  "language": "pl_PL",
  "original_title": null,
  "original_language": "en",
  "first_published": "2014-01-01",
  "genres": [],
  "series": [],
  "cover": "https://quivercdn.com/covers/in-rock/mick-wall/black-sabbath-u-piekielnych-bram_978-83-8408-156-3.webp?v=2026-08-08%2017%3A23%3A37",
  "description": "„ Black Sabbath. U piekielnych bram” to obszerna, szczegółowa opowieść o zespole, który stał się fundamentem sceny ciężkiego rocka. Autor zabiera nas do Aston, robotniczej dzielnicy Birmingham, gdzie na gruzach dwóch lokalnych formacji – Rare Breed (Ozzy Osbourne, Geezer Butler) i Mythology (Tony...",
  "editions": [
    {
      "title": "Black Sabbath. U piekielnych bram",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/mick-wall/black-sabbath-u-piekielnych-bram/9788384081563",
      "publisher": "In Rock",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
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      "cover_artists": [],
      "isbn": "978-83-8408-156-3",
      "pages": 430,
      "published": "2025-01-01",
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    {
      "title": "Black Sabbath. U piekielnych bram",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/mick-wall/black-sabbath-u-piekielnych-bram/9788364373022",
      "publisher": "In Rock",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
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      "cover_artists": [],
      "isbn": "978-83-6437-302-2",
      "pages": 444,
      "published": "2014-01-01",
      "language": "pl_PL",
      "cover": "https://quivercdn.com/covers/in-rock/mick-wall/black-sabbath-u-piekielnych-bram_978-83-6437-302-2-5842d70b.jpg?v=2026-09-01%2021%3A01%3A42"
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}