Hi,
I've just got my Nook.
I had been saving up ebooks on Calibre, waiting for it to arrive.
I used Calibre to transfer all my books to the Nook (admittedly, I had about 650.)
When I opened my Nook it went to 'updating new content' and just stayed there for hours.
So I went into it through My Computer and deleted all the files, and then tried just one.
Went back to the nook: one worked just fine, it updated and I could read it.
So then I tried adding five. It took a few seconds, but they uploaded just fine.
So then I tried seven. back to the same problem, just got stuck on updating content.
So I went back and deleted them. But I also deleted the five as they weren't five books I really wanted, and tried to put a few other ones.
Now, when I open my nook, it says it's uploaded new content, but it shows the old five books, but then when you click on them it says it can't open documents. However, it doesn't show any of the other books.
According to Calibre it hasn't got these books and has other ones.
Strangely, the very first book I loaded, which I wanted to keep, is still there and works.
But how do I get it to load other books?

Anyone have any ideas?

I tried resetting it: holding down the power button for 20 (nothing), and even tried taking out the battery and with it plugged in reboot, but it didn't do anything (didn't even switch on).

(have a slight problem in that I'm not actually in the US, I got a friend to post it over to me.)

Any advice would be useful, or else I have a very expensive way of reading just one book!