John Mark Ockerbloom recently said, while trying to buy a DRM-free copy of John Scalzi's Redshirts on the Google Play Store: “The catalog page doesn’t tell me what format it’s in, or whether it has DRM; it instead just asks me to sign in to buy it.” I noted that if you read the full description (you have to click More), it actually does say:
At the publisher's request, this title is being sold without Digital Rights Management software (DRM) applied.
And that lead to the realization you search for the magic phrase: this title is being sold without Digital Rights Management software, you'll find plenty of books up for sale on Google Play without DRM. When you buy one, you can then download the ePub from the How to Read tab for the book. Pretty straightforward, no?