** Re-downloading your books: You should always be able to do this. Who does not allow it? Fortunately, I’ve never had to re-download any of my books from any of the stores I frequent, so I’m curious about other people’s experiences.
I was just reminded of another example -- Kobo. I manually DL all my Kobo purchases and absolutely do NOT want to auto-sync. However, the only way I have found to stop my Kobo Touch eReader from trying to sync is to -delete- the books from my purchased/to-read list (whatever they call it.) *poof* They are gone for good into some vanishing black hole and no longer listed in my account library. AFAIK there is no way to move them from the 'to-read' list and there is no way to mark them as 'don't sync' or something similar, and there is no way to re-download these books. For all I know there may not even be a way to track that I own them period without some serious customer service hoops and my original purchase confirmation email.