{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Book",
  "type": "object",
  "description": "Metadata for a single Project Gutenberg ebook.",
  "properties": {
    "id": {
      "type": "integer",
      "description": "Project Gutenberg ID number of the book."
    },
    "title": {
      "type": ["string", "null"],
      "description": "Title of the book."
    },
    "authors": {
      "type": "array",
      "description": "People credited as authors of the book.",
      "items": { "$ref": "gutendex-person-schema.json" }
    },
    "summaries": {
      "type": "array",
      "description": "Plain-text summaries of the book.",
      "items": { "type": "string" }
    },
    "editors": {
      "type": "array",
      "description": "People credited as editors of the book.",
      "items": { "$ref": "gutendex-person-schema.json" }
    },
    "translators": {
      "type": "array",
      "description": "People credited as translators of the book.",
      "items": { "$ref": "gutendex-person-schema.json" }
    },
    "subjects": {
      "type": "array",
      "description": "Library of Congress subject headings assigned to the book.",
      "items": { "type": "string" }
    },
    "bookshelves": {
      "type": "array",
      "description": "Project Gutenberg bookshelves containing the book.",
      "items": { "type": "string" }
    },
    "languages": {
      "type": "array",
      "description": "Two-character ISO language codes of the book content.",
      "items": { "type": "string" }
    },
    "copyright": {
      "type": ["boolean", "null"],
      "description": "Copyright status: true if copyrighted, false if public domain in the USA, null if unknown."
    },
    "media_type": {
      "type": "string",
      "description": "Media type of the work (for example Text, Sound, Image)."
    },
    "formats": {
      "$ref": "gutendex-format-schema.json"
    },
    "download_count": {
      "type": "integer",
      "description": "Number of times the book has been downloaded from Project Gutenberg."
    }
  }
}