KDP Select promotion for "Trouble at Christmas"

First day of Trouble at Christmas promotion is a little than half over and 33 curious readers downloaded the book at Amazon. This is really an experiment to see how a little "free" influences the other two books "Troubleshooter" and "Brilliant Plan". I purchased a registration service to show up on most of the major "eBooks for free" sites, so let's see what return on investment we will get.