To read e-books on the Kindle official website, you can follow the steps below:

1. Open the browser: Open your favorite web browser, such as Google Chrome, Mozilla Firefox, etc.

2. Go to the Kindle official website: Type "www.amazon.com" in the browser address bar and press Enter. You will be redirected to Amazon's official website.

3. Log in or register: If you already have an Amazon account, click the "Hello, Sign in" button in the upper right corner of the page and log in with your username and password. If you haven't registered yet, you can click the "Create your Amazon account" link under the same button to register.

4. Browse e-books: Type the name of the book, author, or keyword you want to read in the search bar of the official website, and then click the Search button. You will see a list of books related to your search.

5. Buy e-books: After selecting the e-book you are interested in, click on the cover or title of the book to enter the book details page. Find the purchase option on the page (usually a yellow button) and click the purchase button to complete the purchase.

6. Send the book to your Kindle device: After the purchase is complete, you will see a pop-up window providing the option to send the book to your Kindle device or Kindle reading application. Select your Kindle device and confirm the send. Wait a moment and your purchased e-book will be sent to your Kindle device.

7. Read on Kindle device: Turn on your Kindle device and find the e-book you just purchased on the home screen. Click on the book cover to start reading.

Please note that the above steps are general processes and may vary due to updates to the Amazon official website or the service methods provided in different countries/regions. If you encounter any problems during use, it is recommended that you consult the help documents on the Amazon official website or contact its customer support for detailed operation instructions.