Vanished: A Greywalker Novel - Kat Richardson I give this book 2 1/2 stars. I do enjoy reading The Greywalker series and this book was unanswered questions slowly coming to the surface. I'm not sure why, but this book fell a little flat and wasn't as addictive as I found the first three. There was a lot of set up for a new arc in this series and I will continue to follow Harper as she fumbles her way through these huge messes she gets herself in.