Christmas Caramel Murder

It took a surprisingly long time to get to the actual murder, and I'm not quite sure there was much detective work actually done. The characters were shallow, and I would emphatically recommend not starting with this one, because it operates under the assumption that you've read the other 19 and little in the way of character development or explanation is provided herein.
A quick vapid read, that I guess got me in the spirit of Christmas?