This book has an auspicious start: Ember Squires has died in a car crash. At the moment, that's all we know.
Then, shortly thereafter, a character thinks to herself, over the course of the last 106 years this is the first time this had happened. Now I'm thinking, what is this book all about?
Next, Ember leaves her apartment and finds, Kaia, a young woman outside who tells Ember that she is her handler and a direct employee on earth, and will accompany here everywhere she goes. And Ember replies, "We're still on Earth?"
Then Kaia says, "Welcome to Hell on Earth"... Technically, it's known as "middle realm." As it turns out, they both now work for the Devil and Kaia is a demon, a higher entity than Ember, the newbie.
Then Kaia explains the rules. Now it's getting more interesting. We know that Ember is a hunter, but we don't know yet who or what Ember is hunting.
Now you might think this is all about the Devil's work. But, thoughtfully, though, it should have been obvious that there are angels at work here too. And there are. And it gets real interesting when there is a battle between a couple of angels and our two anti-heroes, Ember and Kaia.
It's certainly different than any other book I've read. It's a treat and you should read it.