This is, I believe, Ms. Ellis' first published book, though its original title was Mask Wars.
This book introduces us to DI Nikki Galena and DS Joseph Easter. DI Galena is a detective who not only had a young woman die in her arms, but whose daughter is in a persistent vegetative state due to a drug over dose. She's now hell bent on clearing the streets of drugs and punishing the dealers though whatever means necessary. She's tough, and has a reputation as a hardass, and pretty much no one wants to work with her. She's been told by her superiors that she is to work with DS Easter, who is transferring in, and to make it work...or else.
DS Easter, on the other hand is pretty much so clean he squeaks. He's also rumored to be highly religious and as such has the nickname of "Holy Joe."
As the two begin to work together, they both begin to realize their preconceived notions about the other were wrong, and there's much more to each of them than meets the eye.
I really liked both of these characters (especially DI Galena) as well as the other members if Galena's team. I'm looking forward to seeing how they grow over the course of the books.
( I do have a feeling that there's going to eventually be a romance between Galena and Easter. I don't know why, but I just do.)
The plot, I won't even try to describe it, but it starts with a missing girl, and a rash of crimes being committed by people wearing hideous face masks. Are these two events, and well as several other crimes all linked? And if so, how? And why?
I am so glad that Richard Armitage started narrating Ms. Ellis' other series (Jackman & Evans), because otherwise, I may never have discovered her work, and that would be such a shame.