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  "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": "Das Zeichen der Vier",
  "subtitle": null,
  "slug": "das-zeichen-der-vier",
  "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/de/das-zeichen-der-vier",
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  "authors": [
    {
      "name": "Arthur Conan Doyle",
      "slug": "arthur-conan-doyle",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle"
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  "language": "de_DE",
  "original_title": "The Sign of Four",
  "original_language": "en",
  "first_published": "2007-11-28",
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      "code": "FB",
      "heading": "Proza literacka"
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    {
      "code": "FF",
      "heading": "Literatura kryminalna i detektywistyczna"
    }
  ],
  "series": [
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      "name": "Sherlock Holmes",
      "slug": "sherlock-holmes",
      "volume": 2,
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  "cover": "https://quivercdn.com/covers/insel/arthur-conan-doyle/das-zeichen-der-vier_978-34-5835-014-9.webp?v=2026-07-20%2010%3A32%3A14",
  "description": "Endlich ein neuer Fall für Sherlock Holmes! Sieben Jahre sind seit seinem Zusammentreffen mit Dr. Watson und ihrem ersten gemeinsamen Fall vergangen. In dieser Zeit schienen die Verbrecher zu pausieren. Doch nun erreicht Holmes das verzweifelte Hilfegesuch einer jungen Frau, und Watson knüpft amouröse Bande . . .",
  "editions": [
    {
      "title": "Das Zeichen der Vier",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/de/das-zeichen-der-vier/9783458350149",
      "publisher": "insel",
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "isbn": "978-34-5835-014-9",
      "pages": 196,
      "published": "2007-11-28",
      "language": "de_DE",
      "cover": "https://quivercdn.com/covers/insel/arthur-conan-doyle/das-zeichen-der-vier_978-34-5835-014-9.webp?v=2026-07-20%2010%3A32%3A14"
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    {
      "title": "The Sign of Four",
      "language": "en_GB",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/en/the-sign-of-four"
    },
    {
      "title": "El signo de los cuatro",
      "language": "es_ES",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/es/el-signo-de-los-cuatro"
    },
    {
      "title": "Le Signe des 4",
      "language": "fr_FR",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/fr/le-signe-des-4"
    },
    {
      "title": "Il segno dei quattro",
      "language": "it_IT",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/it/il-segno-dei-quattro"
    },
    {
      "title": "Znak czterech",
      "language": "pl_PL",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/znak-czterech"
    },
    {
      "title": "O signo dos quatro",
      "language": "pt_BR",
      "url": "https://www.kolczanksiazek.pl/arthur-conan-doyle/pt/o-signo-dos-quatro"
    },
    {
      "title": "Знак чотирьох",
      "language": "uk_UA",
      "url": "https://www.kolczanksiazek.pl/artur-konan-doil/uk/znak-chotyrokh"
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  "characters": [],
  "chapters": []
}