[rmkrmk]

I'm using a library card outside of the U.S. with Libby and send all my loans to my Kindle via amazon.de, works fine

[goosedragons]

Is it a U.S library card? Or a library card from outside the U.S (e.g., a German one)? That's not clear from how you wrote it. I believe it's a U.S library only thing. Libby's own FAQ says it's U.S only but perhaps they just haven't updated it.

[rmkrmk]

It's a German library card