{
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    "name": "Kołczan Książek",
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    "url": "https://www.kolczanksiazek.pl"
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  "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": "A War of Wyverns",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/sf-williamson/a-war-of-wyverns/9780008652326",
  "publisher": "HarperCollins",
  "publisher_series": [],
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "978-00-0865-232-6",
  "pages": null,
  "published": "2026-01-01",
  "language": "pl_PL",
  "cover": "https://quivercdn.com/covers/harpercollins/sf-williamson/a-war-of-wyverns_978-00-0865-232-6.webp?v=2026-08-07%2023%3A44%3A29",
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  "markdown": "https://www.kolczanksiazek.pl/sf-williamson/a-war-of-wyverns/9780008652326.md",
  "binding": "Softcover",
  "description": "REBELLION HAPPENS IN THE SHADOWSVivien Featherswallow has uncovered the secret language of dragons. Now can she use it to end a war? The extraordinary sequel to the instant #1 Sunday Times Bestseller, A Language of DragonsVivien Featherswallow has translated a secret language of dragons – sparking...",
  "book": {
    "title": "A War of Wyverns",
    "slug": "a-war-of-wyverns",
    "url": "https://www.kolczanksiazek.pl/sf-williamson/a-war-of-wyverns"
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  "authors": [
    {
      "name": "S.F. Williamson",
      "slug": "sf-williamson",
      "url": "https://www.kolczanksiazek.pl/sf-williamson"
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