There are several ways to transfer an e-book from a computer to a mobile phone: 1 Use a cloud storage service: upload your e-book to a cloud storage service such as Google Cloud Storage or Amazon S3 and access the service's file system on your phone to find and download the e-book. 2. Transfer using a data cable: connect the phone to the computer and transfer the e-book to the phone through the USB connection. You can use any USB driver, including the USB drivers on your Windows and the USB drivers on your Macs. 3. Transfer via Bluetooth: If your phone supports Bluetooth, you can transfer the e-book to your phone via Bluetooth. Turn on the Bluetooth function on the computer and then search for a Bluetooth device on the phone. After selecting the Bluetooth device on the computer, you can transfer the e-book. 4. Transfer using Wi-Fi: If the phone and computer are on the same Wi-Fi network, you can transfer the e-book to the phone through Wi-Fi. Turn on the Wi-Fi function on the computer and then search for a Wi-Fi device on the phone. After selecting the Wi-Fi device on the computer, you can transfer the e-book. Either way, you should ensure that the e-book is saved in the correct location so that you can find and download the e-book on your phone.