The search filter lets you sort your books into categories so that you can find your eBooks faster.
- Go to your Home screen.
- Tap the My Books icon at the bottom of the screen. 
- Tap Filter near the top of the screen.
- 
Tap on a filter that you’d like to use to sort your books. You can filter your books by:
 - Purchased books
- Previews
- Downloaded books
- eBooks or Audiobooks
- Read and unread books