The most recommended free e-book readers available on the Google Play Store for Android are the Google Books app, FBReader and Moon+ Reader. Google Books and FBReader are completely free while Moon+ Reader has a free version in addition to a paid version.
The Google Books app is part of the Google software ecosystem and links with existing Google accounts such as those for Gmail or YouTube. Common features associated with a good e-book reader include ePUB and PDF format compatibility in addition to text document formats such as TXT, DOC and RTF as well as archive formats RAR and ZIP. Pinch and zoom, text smoothing and fast page rendering are other popular functions associated with these e-book readers.