Also, I think it's safe to say that most people always want to borrow the book in the same format (epub, kindle, pdf). Most likely the only time they would want a different format is when their preferred format is not available. So why not make that a *user* preference? I could set "I want epubs" in My Account and then I would only see the checkboxes when epub is not available. OR, right by the Download button, it would say "you are downloading: epub. Change" And that would allow me to change to a different format.
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