Google Play - Google Play Books app now has Night Light, a feature that gradually filters blue light from your screen, replacing it with a warm, amber light as the sun sets.
![How to turn on night light for Google Play Books | Enable night light on Books | Techno Logic - YouTube How to turn on night light for Google Play Books | Enable night light on Books | Techno Logic - YouTube](https://i.ytimg.com/vi/xZYDXs4hKIw/hqdefault.jpg)
How to turn on night light for Google Play Books | Enable night light on Books | Techno Logic - YouTube
![Set night mode in play books now can't turn it off for entire phone? - Android Forums at AndroidCentral.com Set night mode in play books now can't turn it off for entire phone? - Android Forums at AndroidCentral.com](https://i.ytimg.com/vi/i1wy5kB74xk/mqdefault.jpg)