For the Google Play Books application:
- On your computer, open the folder "Tablet," then "Documents."
- Copy your Gallup e-book from your computer to the "Documents" folder.
- On your device, open "My Files," then "Documents."
- Click on the title of your e-book and select the application "Play Books" to open the e-book.
Please refer to the manufacturer's website or contact Android support for further information or assistance.