{
  "type": "book",
  "site": {
    "name": "The Book Quiver",
    "language": "en-US",
    "url": "https://www.bookquiver.com"
  },
  "formats": "Every page has two versions with the same data: JSON (the page address + .json) and markdown (the page address + .md). Append .json or .md to any `url` in this document.",
  "title": "On What Matters",
  "subtitle": null,
  "slug": "on-what-matters",
  "url": "https://www.bookquiver.com/derek-parfit/on-what-matters",
  "json": "https://www.bookquiver.com/derek-parfit/on-what-matters.json",
  "markdown": "https://www.bookquiver.com/derek-parfit/on-what-matters.md",
  "authors": [
    {
      "name": "Derek Parfit",
      "slug": "derek-parfit",
      "url": "https://www.bookquiver.com/derek-parfit"
    }
  ],
  "language": "en_US",
  "original_title": null,
  "original_language": null,
  "first_published": "2013-07-11",
  "genres": [
    {
      "code": "QD",
      "heading": "Philosophy"
    }
  ],
  "series": [],
  "cover": "https://quivercdn.com/covers/academia/derek-parfit/on-what-matters_978-01-9968-103-7-f2b8e0c4.webp?v=2026-11-09%2021%3A16%3A06",
  "description": "This is the first volume of a major work in moral philosophy, the long-awaited follow-up to Parfit's classic Reasons and Persons, a landmark of 20th-century philosophy. Parfit presents a powerful new treatment of reasons and a critical examination of the most prominent systematic moral theories, leading to his own ground-breaking conclusion.",
  "editions": [
    {
      "title": "On What Matters",
      "subtitle": null,
      "url": "https://www.bookquiver.com/derek-parfit/on-what-matters/9780199681037",
      "publisher": "academia",
      "translators": [],
      "medium": "paper",
      "duration_seconds": null,
      "narrators": [],
      "illustrators": [],
      "cover_artists": [],
      "isbn": "978-01-9968-103-7",
      "pages": 592,
      "published": "2013-07-11",
      "language": "en_US",
      "cover": "https://quivercdn.com/covers/academia/derek-parfit/on-what-matters_978-01-9968-103-7-f2b8e0c4.webp?v=2026-11-09%2021%3A16%3A06"
    }
  ],
  "other_languages": [],
  "characters": [],
  "chapters": []
}