{
  "type": "series",
  "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.",
  "name": "Empireum",
  "slug": "empireum",
  "url": "https://www.kolczanksiazek.pl/rebecca-yarros/seria/empireum",
  "json": "https://www.kolczanksiazek.pl/rebecca-yarros/seria/empireum.json",
  "markdown": "https://www.kolczanksiazek.pl/rebecca-yarros/seria/empireum.md",
  "author": {
    "name": "Rebecca Yarros",
    "slug": "rebecca-yarros",
    "url": "https://www.kolczanksiazek.pl/rebecca-yarros"
  },
  "books_in_catalog": 3,
  "volumes_total": 3,
  "published": "2023–2025",
  "missing_volumes": [],
  "books": [
    {
      "volume": 1,
      "title": "Fourth Wing. Czwarte Skrzydło",
      "subtitle": null,
      "slug": "fourth-wing-czwarte-skrzydlo",
      "url": "https://www.kolczanksiazek.pl/rebecca-yarros/fourth-wing-czwarte-skrzydlo",
      "publisher": "hype",
      "published": "2023-11-24",
      "isbn": "978-83-8357-096-9"
    },
    {
      "volume": 2,
      "title": "Iron Flame. Żelazny płomień",
      "subtitle": null,
      "slug": "iron-flame-zelazny-plomien",
      "url": "https://www.kolczanksiazek.pl/rebecca-yarros/iron-flame-zelazny-plomien",
      "publisher": "hype",
      "published": "2024-06-13",
      "isbn": "978-83-8357-479-0"
    },
    {
      "volume": 3,
      "title": "Onyx Storm. Onyksowa burza",
      "subtitle": null,
      "slug": "onyx-storm-onyksowa-burza",
      "url": "https://www.kolczanksiazek.pl/rebecca-yarros/onyx-storm-onyksowa-burza",
      "publisher": "Filia",
      "published": "2025-01-01",
      "isbn": "978-83-8402-338-9"
    }
  ]
}