It is crashing...
iPad installed version 10.1.1
The current version starts up, flashes the books you have in your library, then shunts off to the home screen. It does not close completely, but it does not provide access.
Either do not load this version until it is fixed or be cautious about getting the upgrades.
Normally this is a 5 app. This version should not receive a rating, but no stars is not permitted. I will update once it is repaired.
wraives about
Google Play Books - Books & Comics, v3.0.2