You can add your other books in this section of the homepage.
Please follow the below video tutorial or the following steps to configure Book section:
- Go to Appearance > Customize > Front Page Section > Book Section
- Enter the Book Section Title & Description
- Select the Book Section Layouts & number of books to display
- Select the Books you want to display
- Click on Publish
Note: You need to create an individual post for every book you want to show in the Book Section. You can create a post by going to Posts>Add New.