# cast.[framework](https://developers.google.com/cast/docs/reference/web_receiver/cast.framework).[messages](https://developers.google.com/cast/docs/reference/web_receiver/cast.framework.messages).AudiobookChapterMediaMetadata

class static

An audiobook chapter description.

## Constructor

### AudiobookChapterMediaMetadata

new
AudiobookChapterMediaMetadata()

## Properties

### bookTitle

(string or undefined)

The audiobook title.

### chapterNumber

(number or undefined)

The chapter number, used for display purposes.

### chapterTitle

(string or undefined)

The chapter title.

### contentRating

<br />

The content rating.

### images

(non-null Array of non-null [cast.framework.messages.Image](https://developers.google.com/cast/docs/reference/web_receiver/cast.framework.messages.Image) or undefined)

The chapter or book cover art.

### subtitle

(string or undefined)

The audiobook title, for backward compatibility.

### title

(string or undefined)

The chapter title, for backward compatibility.