So I took a book out.
Works fine..I can view it in cloud too
I downloaded the book to the pc and then to the kindle...
in cloud it expired but on kindle it hasn't...I'm not complaining but I was under the general impression that files were to be automatically deleted upon syncing or that after x number of days it would stop working...
If they want to give out books free that's fine but I would find this to be quite odd