{
  "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": "The Sleepwalker",
  "subtitle": null,
  "slug": "the-sleepwalker",
  "url": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker",
  "json": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker.json",
  "markdown": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker.md",
  "authors": [
    {
      "name": "Lars Kepler",
      "slug": "lars-kepler",
      "url": "https://www.kolczanksiazek.pl/lars-kepler"
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  "language": "en_GB",
  "original_title": "Sömngångaren",
  "original_language": "sv",
  "first_published": "2026-01-01",
  "genres": [
    {
      "code": "FB",
      "heading": "Proza literacka"
    },
    {
      "code": "FF",
      "heading": "Literatura kryminalna i detektywistyczna"
    },
    {
      "code": "FH",
      "heading": "Thrillery i suspens"
    },
    {
      "code": "FK",
      "heading": "Horrory i literatura grozy"
    }
  ],
  "series": [
    {
      "name": "Joona Linna",
      "slug": "joona-linna",
      "volume": 10,
      "url": "https://www.kolczanksiazek.pl/lars-kepler/seria/joona-linna"
    }
  ],
  "cover": "https://quivercdn.com/covers/zaffre/lars-kepler/the-sleepwalker_978-18-3877-792-0-350b8e3e.webp?v=2026-11-02%2020%3A30%3A28",
  "description": "An alarm sounds in the middle of the night for a burglary in progress at a winter-closed campsite in Bredäng, outside Stockholm. The police spot a light in one of the farthest caravans and when the officers open the door they are greeted by a horrific sight. Floors, walls and furniture are...",
  "editions": [
    {
      "title": "The Sleepwalker",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker/9798217010141",
      "publisher": "Vintage Crime Black Lizard",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "illustrators": [],
      "cover_artists": [],
      "isbn": "979-82-1701-014-1",
      "pages": 496,
      "published": "2027-02-02",
      "language": "en_US",
      "cover": "https://quivercdn.com/covers/vintage-crime-black-lizard/lars-kepler/the-sleepwalker_979-82-1701-014-1.jpg?v=2026-05-24%2010%3A06%3A10"
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    {
      "title": "The Sleepwalker",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker/9781838777920",
      "publisher": "Zaffre",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
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      "cover_artists": [],
      "isbn": "978-18-3877-792-0",
      "pages": 512,
      "published": "2026-01-01",
      "language": "en_GB",
      "cover": "https://quivercdn.com/covers/zaffre/lars-kepler/the-sleepwalker_978-18-3877-792-0-350b8e3e.webp?v=2026-11-02%2020%3A30%3A28"
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    {
      "title": "The Sleepwalker",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/lars-kepler/en/the-sleepwalker/9781838777913",
      "publisher": "Zaffre",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "illustrators": [],
      "cover_artists": [],
      "isbn": "978-18-3877-791-3",
      "pages": 512,
      "published": "2025-07-14",
      "language": "en_US",
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  "other_languages": [
    {
      "title": "Náměsíčník",
      "language": "cs_CZ",
      "url": "https://www.kolczanksiazek.pl/lars-kepler/cs/namesicnik"
    },
    {
      "title": "Le Somnambule",
      "language": "fr_FR",
      "url": "https://www.kolczanksiazek.pl/lars-kepler/fr/le-somnambule"
    },
    {
      "title": "Lunatyk",
      "language": "pl_PL",
      "url": "https://www.kolczanksiazek.pl/lars-kepler/lunatyk"
    }
  ],
  "characters": [],
  "chapters": []
}