Google has a huge number of out of copyright (e.g. published in the US before 1923) ebooks that are free. These are all DRM-free.
If they are selling ebooks from major publishers, they will have Adobe DRM - just as they would from the Sony Store.
They do sell other ebooks without DRM. From
DRM options for Google eBooks downloads
Quote:
|
You can choose if you would prefer not to apply Digital Rights Management (DRM) software to the digital file download of your book.
|
Note that this is for authors and/or publishers.
My guess is that their “oreilly books” are DRM-free, but if so I can't tell this from the book description. O'Reilly computer books are DRM-free when bought from O'Reilly and have DRM when bought from the Kindle Store. So it would not be a definitive test.