{
  "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": "Mater et magistra",
  "subtitle": null,
  "slug": "mater-et-magistra",
  "url": "https://www.kolczanksiazek.pl/jan-xxiii/mater-et-magistra",
  "json": "https://www.kolczanksiazek.pl/jan-xxiii/mater-et-magistra.json",
  "markdown": "https://www.kolczanksiazek.pl/jan-xxiii/mater-et-magistra.md",
  "authors": [
    {
      "name": "Jan XXIII",
      "slug": "jan-xxiii",
      "url": "https://www.kolczanksiazek.pl/jan-xxiii"
    }
  ],
  "language": "pl_PL",
  "original_title": null,
  "original_language": null,
  "first_published": "1997-01-01",
  "genres": [],
  "series": [],
  "cover": "https://quivercdn.com/covers/wydawnictwo-wroclawskiej-ksiegarni-archidiecezjalnej-tum/jan-xxiii/mater-et-magistra_8-386-96810-9-43d611be.jpg?v=2026-09-02%2014%3A20%3A54",
  "description": "Encyklika o współczesnych przemianach społecznych w świetle nauki chrześcijańskiej. Komentarz ks. Józef Majka.",
  "editions": [
    {
      "title": "Mater et magistra",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/jan-xxiii/mater-et-magistra/8386968109",
      "publisher": "Wydawnictwo Wrocławskiej Księgarni Archidiecezjalnej TUM",
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "illustrators": [],
      "cover_artists": [],
      "isbn": "8-386-96810-9",
      "pages": 121,
      "published": "1997-01-01",
      "language": "pl_PL",
      "cover": "https://quivercdn.com/covers/wydawnictwo-wroclawskiej-ksiegarni-archidiecezjalnej-tum/jan-xxiii/mater-et-magistra_8-386-96810-9-43d611be.jpg?v=2026-09-02%2014%3A20%3A54"
    }
  ],
  "other_languages": [],
  "characters": [],
  "chapters": []
}