{
  "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": "Ego is the Enemy. The Fight to Master Our Greatest Opponent",
  "subtitle": null,
  "slug": "ego-is-the-enemy-the-fight-to-master-our-greatest-opponent",
  "url": "https://www.kolczanksiazek.pl/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent",
  "json": "https://www.kolczanksiazek.pl/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent.json",
  "markdown": "https://www.kolczanksiazek.pl/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent.md",
  "authors": [
    {
      "name": "Ryan Holiday",
      "slug": "ryan-holiday",
      "url": "https://www.kolczanksiazek.pl/ryan-holiday"
    }
  ],
  "language": "pl_PL",
  "original_title": null,
  "original_language": "en",
  "first_published": "2017-01-01",
  "genres": [
    {
      "code": "KJ",
      "heading": "Biznes i zarządzanie"
    },
    {
      "code": "VSC",
      "heading": "Poradnictwo zawodowe, sukces i kariera"
    }
  ],
  "series": [],
  "cover": "https://quivercdn.com/covers/profile-books/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent_978-17-8125-702-9.webp?v=2026-08-09%2016%3A39%3A08",
  "description": "A powerful meditation on the nature and dangers of ego, from the author of the #1 New York Times bestseller Stillness is the Key, and Obstacle is the Way - over 1 million copies sold'Re-read it each year. It's that important' Derek Sivers, author of Anything You Want'Ryan Holiday is one of his...",
  "editions": [
    {
      "title": "Ego is the Enemy. The Fight to Master Our Greatest Opponent",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent/9781781257029",
      "publisher": "Profile Books",
      "publisher_series": [],
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "illustrators": [],
      "cover_artists": [],
      "isbn": "978-17-8125-702-9",
      "pages": 226,
      "published": "2017-01-01",
      "language": "pl_PL",
      "cover": "https://quivercdn.com/covers/profile-books/ryan-holiday/ego-is-the-enemy-the-fight-to-master-our-greatest-opponent_978-17-8125-702-9.webp?v=2026-08-09%2016%3A39%3A08"
    }
  ],
  "other_languages": [
    {
      "title": "Его — це ворог",
      "language": "uk_UA",
      "url": "https://www.kolczanksiazek.pl/raian-holidei/uk/eho-tse-voroh"
    }
  ],
  "characters": [],
  "chapters": []
}