Here's an odd question, Ragdoll and I ran into this, this week, and I'm not sure if it was a glitch or if it's something we're not aware of.
A couple of weeks ago (not sure of the exact date), I lent a book to her. I then tried lending a second book to her a couple of days ago and my nook said it went through. It didn't as we found out last night/this morning. The other book showed as still being out on loan. So I tried again today and it showed the other book as back and this time it went through. Can a borrower only borrow one book at a time from each lender?