---
title: AssistantSchemas.BooksEnum
framework: appintents
role: symbol
role_heading: Protocol
path: appintents/assistantschemas/booksenum
---

# AssistantSchemas.BooksEnum

Assistant schema conformance for types you use to describe ebooks or audiobooks.

## Declaration

```swift
protocol BooksEnum : AssistantSchemas.Model
```

## Topics

### Instance Properties

- [contentType](appintents/assistantschemas/booksenum/contenttype.md)
- [font](appintents/assistantschemas/booksenum/font.md)
- [fontSize](appintents/assistantschemas/booksenum/fontsize.md)
- [navigationDirection](appintents/assistantschemas/booksenum/navigationdirection.md)
- [pageNavigationSetting](appintents/assistantschemas/booksenum/pagenavigationsetting.md)
- [relativeCharacterSpacingChange](appintents/assistantschemas/booksenum/relativecharacterspacingchange.md)
- [relativeFontChange](appintents/assistantschemas/booksenum/relativefontchange.md)
- [relativeLineSpacingChange](appintents/assistantschemas/booksenum/relativelinespacingchange.md)
- [relativeWordSpacingChange](appintents/assistantschemas/booksenum/relativewordspacingchange.md)
- [theme](appintents/assistantschemas/booksenum/theme.md)

## Relationships

### Inherits From

- [AssistantSchemas.Model](appintents/assistantschemas/model.md)

### Conforming Types

- [AssistantSchema.EnumSchema](appintents/assistantschema/enumschema.md)
- [AssistantSchemas.EnumSchema](appintents/assistantschemas/enumschema.md)