Is this the same as the Lending Library you'll get with Prime, where you can get 1 book for free per month if you're Prime customer? If so, the offer in Germany

Is this the same as the Lending Library you'll get with Prime, where you can get 1 book for free per month if you're Prime customer? If so, the offer in Germany is absolutely terrible. I found only 2 books in that library, because they count endless self-published garbage-titles to their library of "600,000+" titles. From the comments here, I assume that the model is similar in the US and 9.99$ is only so cheap, because there's mostly junk in the library.