- `id` - Number, optional, original ID for the book from exported system.
- `name` - String, required, name/title of the book.
- `description_html` - String, optional, HTML description content.
-- `cover` - String reference, options, reference to book cover image.
+- `cover` - String reference, optional, reference to book cover image.
- `chapters` - [Chapter](#chapter) array, optional, chapters within this book.
- `pages` - [Page](#page) array, optional, direct child pages for this book.
- `tags` - [Tag](#tag) array, optional, tags assigned to this book.
- `name` - String, required, name of attachment.
- `link` - String, semi-optional, URL of attachment.
- `file` - String reference, semi-optional, reference to attachment file.
-- `order` - Number, optional, integer order of the attachments (shown low to high).
Either `link` or `file` must be present, as that will determine the type of attachment.
#### Tag
- `name` - String, required, name of the tag.
-- `value` - String, optional, value of the tag (can be empty).
-- `order` - Number, optional, integer order of the tags (shown low to high).
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+- `value` - String, optional, value of the tag (can be empty).
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