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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",
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      "name": "S.F. Williamson",
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      "heading": "Fantastyka naukowa (science fiction)"
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    {
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      "heading": "Fantasy"
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    {
      "code": "XA",
      "heading": "Komiks i powieść graficzna i manga – style i tradycje"
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      "code": "Y",
      "heading": "Publikacje dla dzieci i młodzieży, edukacja"
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  "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",
  "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...",
  "editions": [
    {
      "title": "A War of Wyverns",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/sf-williamson/a-war-of-wyverns/9780008652326",
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