Addendum
As a bit of a Halloween greeting I sent the complete shadow person tome to a few friends. One of them replied:
Very good read. My youngest has seen hat man crossing my hallway towards the wall and out the apt. She told me a few times and was scared. She also gets sleep paralysis til this day. A shadow man has sat on her chest and she would wake up screaming and gasping for air.
I wish I hadn’t read her email before I went to bed last night.
Her “youngest,” by the way, is an adult. In her mid-20s, I think.