Franklin Endicott and the Third Key

I listed to this from the Libby app as an audiobook and I wonder if that was half the entertainment. I was pre-reading for my Kindergarten read alouds next year and this one is a new Sonlight addition since the last time I did Kindergarten (aka Core A). This is a winner and I look forward to sharing it. I need to get a copy for our shelf, or the audiobook. I must add it is also my first experience with Mercy Watson, even if she is an extra character in this story.