"Thank you for purchasing Naughty Nurses on Holiday. It is now available for download to your Nook."
I think you can turn off all notifications by unchecking the e-mail option in account preferences:
I think it, worked. Lol i didn't order that book you mentioned. I just don't want to many unwanted emails in my account,. thank you for the help
For this: Also my Nook HD Sound/Speakers aren't working anymore. Is there anything I can do to fix that
Google Play store has some volume control apps like Multi-Volume something.
Just download one of them and mute and unmute the sound. After that it should work.