{
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    "name": "Kołczan Książek",
    "language": "pl-PL",
    "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": "On Wings Of Blood. Bloodwing Academy 1",
  "subtitle": null,
  "url": "https://www.kolczanksiazek.pl/briar-boleyn/on-wings-of-blood-bloodwing-academy-1/9780008792077",
  "publisher": "HarperCollins",
  "translators": [],
  "medium": "paper",
  "duration_seconds": null,
  "narrators": [],
  "illustrators": [],
  "cover_artists": [],
  "isbn": "978-00-0879-207-7",
  "pages": null,
  "published": "2025-01-01",
  "language": "pl_PL",
  "cover": "https://quivercdn.com/covers/harpercollins/briar-boleyn/on-wings-of-blood-bloodwing-academy-1_978-00-0879-207-7.webp?v=2026-08-13%2022%3A16%3A54",
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  "markdown": "https://www.kolczanksiazek.pl/briar-boleyn/on-wings-of-blood-bloodwing-academy-1/9780008792077.md",
  "binding": "Softcover",
  "description": "It's THE hottest romantasy sensation that EVERYONE is talking about and instant New York Times bestseller! What do you get if you mix Fourth Wing with Zodiac Academy, a dash of Arthurian legend, and lots and lots of vampires? Welcome to Bloodwing Academy. Expect magic. Expect competition....",
  "book": {
    "title": "On Wings Of Blood. Bloodwing Academy 1",
    "slug": "on-wings-of-blood-bloodwing-academy-1",
    "url": "https://www.kolczanksiazek.pl/briar-boleyn/on-wings-of-blood-bloodwing-academy-1"
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  "authors": [
    {
      "name": "Briar Boleyn",
      "slug": "briar-boleyn",
      "url": "https://www.kolczanksiazek.pl/briar-boleyn"
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