Google last year showed off its revamped Material design language and started rolling out to first-party apps over the course of the past months. We've already seen the redesign go live in Google Tasks, Google Maps, Google Photos, Assistant, Gmail, and everybody's favorite Calculator app, but the latest in line to get the Material design treatment is Google Play Books.
Android Police reports, with the changes to the app being mostly cosmetic and subtle.Some of the aforementioned redesigns have been quite substantial, while others – merely a fresh coat of paint. Play Books seems to fall into the second category, as
Some of the more obvious changes include a redesigned book carousel on the "Home" screen, hollow icons — the old iconography was solid, but the new one relies on bold lines only — and Google's Product Sans font has taken over all menus and screens of Play Books.
As is the case with most updates to first-party Google apps, this rollout is staged as well. This means that not everyone is going to get the redesigned user interface at the same time, but rather that the update is going to go live in different regions at different times.