{
  "title": "Your Book Title",
  "author": "Author Name",
  "language": "ja",
  "identifier": "",
  "publisher": "",
  "description": "",
  "date": "",
  "rights": "",
  "series": "",
  "series_index": "",
  "font_family": "",
  "vertical": false,
  "show_chapter_titles": false,
  "output": "book.epub",
  "chapter_titles": {
    "ch00_frontmatter": "",
    "ch01_chapter00": "Chapter 00",
    "ch08_backmatter": ""
  }
}