my public libray has just introduced ebook downloads.I was delighted when I saw this on the website.They use adobe digital editions so I thought it would be straightforward.I've tried downloading sample books from the adobe site but get the same message.So I've downloaded three books and I had the "no valid licence problem". I've tried all the advice in these pages and my pc tells me that the downloads have transferred successfully to the ebook reader but I still get the same message. I'm starting to think that Waterstoneslike all the bad publicity because they're really trying to make sure the sale of paper books has no competition by selling inferior products.