Google Play Books

Google Play Books is now available in four more countries, expanding today to Estonia, Latvia, Lithuania and Ukraine. Google Play users in these four countries can now browse, buy and read books downloaded from the Play Store on their phones and tablets, joining up a whole host of countries — 58 to be exact — that came online with the content selection before them.

If you're in one of the aforementioned countries, open up the Play Store and get reading.

Source: Google Play Support