What You'll Need Before Buying a Google eBook(tm):

1.  The Google Books app, available free through the Android Market
2.  A Google Account. Your Android device should  already be set up with a Google Account.

1. Go to Keplers.com, click "My Account" and click "Login With Your Google ID." This will need to be the SAME account that your Android device has already set - if you wish to use a different Google account, you will need to create a new account on your Android device, which you may do at the settings menu.
2. Search for your eBook
3. Add your eBook(s) to your shopping cart, and proceed to checkout.
4. Accept the terms and conditions
5. Complete Checkout

Reading your Google eBook:

1.  Open your Google Books app on your Android device.
2.  The first time you open Google Books, you will need to enter your Google account name and password. 
3.  Tap your book to download and begin reading!