I guess 'Novella' means really short novel. This was a cute, Christmasy story, and it was nice that it was such a quick read, but it seemed like an extremely abridged version of what could've been a much richer story. It was mostly 'just the facts' with a teeny bit of character development throughout. The ending could've been played up a bit more, but as it was, it was just sort of presented... and then done. And it seemed like the character who solved everything could've easily done it on page one without all the hassle of other events that went on in the rest of the book.
Wow, I sound overly critical. Like I said, it was a cute little story and a quick read.