1. In reading mode, touching the area at the top of the screen will pop up a line of function options.

2. In the function options, click the "Home" icon in the upper left corner to return to the main interface of kindle.

3. In the main interface, click the "Library" icon in the upper right corner to enter the library interface.

4. In the library interface, you can see all your e-books, and you can also search, sort and filter.

Kindle library can buy books, the steps are as follows:

1. Log in or register your Amazon account, and set your payment method and address.

2. Click on the store to visit Amazon Kindle e-bookstore to buy e-books.

3. In the store, you can search by keywords such as title and author, and you can also find the e-book you need through the activity area and the recommendation given to you.