To use the bookshelf on your phone, you can follow these steps: 1 Downloading and installing a bookshelf app. Currently, the more popular applications for reading bookshelves include iBooks, Google Play Books, and Amazon's iPhone Store. 2 Open the application and log into your account. If you already have your own account, you can create a bookshelf directly in the application. 3 scan the QR code or manually enter the app's search keywords to find the book you like. 4. Click on the book icon to enter the book details page. Here, one could check the book's detailed information, reviews, ratings, and so on. 5. You can click on the book icon to choose the "Buy" or "Read" option. If you have already bought a book, you can choose the 'Buy' option; if you have not bought a book, you can choose the 'Read' option. 6 Open the Reading Bookshelf application and select the "My Bookshelf" option to add your favorite books to the bookshelf. 7 Open the reading app on your phone and find the books that have been added to the bookshelf to start reading. These were the basic steps to use the bookshelf on the phone.