where are the free books the kindle app offers? According to its description on Google Play, in the third sentence, it says that the books are free. I installed the Kindle app and went to the Kindle Store and all the books I looked at so far all have to be purchased.

Where can the free ebooks be downloaded from? Because when I click 'books on device' in the kindle app, it shows none (so I'm guessing I need to download them from somewhere).
The majority of books on sites like Amazon, Barnes &amp; Nobles, and the like, are definitly payed for. All of them offer some free books to get you in, but you end up in a "closed ecosystem": you can read them only with their dedicated readers, as they often use their own formats (Amazon) or at least some DRM.

If you want to go for free content, you're much better of chosing an eBook reader app supporting the open ePub format (some exemples include, but are not restricted to: Moon+ Reader, FBReader, and Aldiko. At least the first two already ship with a load of free libraries pre-configured, which they can access directly from inside the app.