The chemistry between Ethan and Merit is always a joy, and returning to Chicargoland is like meeting old friends. But in the search for new plots to continue the narrative, there is a great risk of jumping the shark, introducing more and more arcane species and events to generate a story arc. 
 Neill is a great writer, but the resurrection of Ethan from ashes is about as close to jumping the shark as you can yet, especially once you introduce angels and 'demons' into the mix. 
 Neill does this with panache and persuasive logic, always original in her take on a theme. Surely there must be enough character driven narrative options to keep a story going. I'd hate to see this series going the same way as Sookie Stackhouse. I think the twist at the end of the book will do exactly that. 
 This book is still a great read. I was sorry when I finished it.