The Google Play Books update received an update this afternoon to version 2.7.25, expanding support for several features, as well implementing new functionality for others. Here's the changelog:
What's in this version:
You can now listen to most flowing text books using the "Read aloud" feature.
You can now pinch-zoom or double-tap-zoom in all books.
All text editing features are available for notes.
Personalized recommendations are shown at the end of your library and at the end of the books.