John Grisham is a novelist who is a Christian, but, with a few rare exceptions, it is not evident in his books. I suspect that Mark Young, a former cop and author of "Off The Grid", is the same.
The story is about a US Marine who returns home from Afghanistan when his parents are killed in a car bombing. He then joins the Seattle police force, a decision that he thinks will help him better investigate that crime.
His investigations leads him to a sinister plot, by some very powerful people, to heist the information from computers around the world in order to create a new world order. It is what I would call low key James Bond stuff. The action is continuous and the multiple characters are a little difficult to keep straight. The underlying tension in the story is "who do you trust".
The reason I think that the author is a Christian is because a few of his characters are. They talk about their faith and changed lives and all in a good and positive light. But it is by no means a 'Christian novel'.
I would give this book a three star rating.