From the other side
Faith that is in the book without being in your face
What the faith content in these books actually consists of, described plainly, so you can decide rather than guess.
This is the second question after how scary is it, and it gets asked from both directions. Some parents are checking there is enough. Some are checking there is not too much. Both deserve the same straight description.
What is actually in there
The faith content is structural rather than stated. It is in what the story is shaped like, in who turns out to be right, and in what the demon cannot account for. There is no altar call, no chapter where a character explains the gospel to another character, and no study questions bolted to the back.
A reader who does not share the faith gets an adventure story with an unusual narrator. A reader who does gets rather more, and gets it without being addressed.
Said better by a reader than by us
One review put it more precisely than any description we would write: the plot is unique, original, and a great way to bring in the concept of faith based stories. It is not in your face, and yet it makes you think and wonder.
Not in your face is the whole specification, and it came from a reader rather than from marketing.
If you want more than that
Some families want the faith explicit, taught, and checkable. That is a reasonable thing to want and these are not the books for it. A devotional does that job properly and this does not pretend to.
The trade is the same one described everywhere else here: the less it says directly, the more the reader has to bring, and the more of it stays with them afterwards. Which side of that trade you want depends on the child.
Who wrote them matters here
Bryant Benitez is a hospital chaplain and has led Christian churches across several denominations for more than ten years, with a Master of Divinity from Fuller Theological Seminary. He describes his heart as being for those outside of the church.
That last phrase explains the restraint. A book written for people already inside can afford to assume. A book written for people outside cannot, and the author of these has spent his working life with the second group.
It works in a mixed household
A common situation: one parent wants the faith content, the other is wary of it, and the child is in the middle. Books that state their position get vetoed by one side of that arrangement before the child sees them.
These do not force the issue. There is nothing in them a wary parent has to argue with, and nothing a believing parent has to apologise for, which makes them one of the few options that actually gets bought in that house rather than debated and abandoned.
And in a school or a library
The same property makes it usable where a devotional would not be. It is a story about a demon with a job, and it can sit on a classroom shelf on those terms without anybody having to make a case for it.
This is one part of faith fiction told from the other side, the idea behind both books and the podcast.