The biggest consideration with books of this type is best expressed by the author himself: “My greatest concern in writing this series is my limited human ability to appropriately represent the God of the Bible through the use of metaphors”. He makes it clear though that, “My purpose in writing these words is to point you once more to the glorious God of love, His Son Jesus Christ, the Holy Spirit, and the radical intersection of supernatural love through the redemption power of the Gospel”.
We say the good far outweighs any potential concern. You must of course decide for yourself and your home.
There is enough depth and just a bit of content here that makes this not a book for the youngest and most sensitive readers. Below we will give a glimpse at this, but note that it never comes across as scary, overly violent, dark, etc. This is more about helping you determine the fit for your younger readers.
A few comments/things to be aware of:
It is mentioned that an area is so bad that “Death was the reward that prisoners pleaded for”.
A young girl they met has lost her parents in a terrible war.
There is a time when the characters are said to be drinking “ale”. It is never implied it is alcohol and there is no drunkenness, but some may assume that.
There is some sneaking around and dishonesty.
There is a reference to an oracle. The ‘worldly’ one is shown as a total farce for “entertainment”. Eventually they meet an ‘oracle’ from the people representing the Jews and we find out she is really what we would refer to as a prophet.
A female spy is said to be conducting “emotional seduction” (nothing sexual ever said or implied, hence ‘emotional’).
An impossible feeling mission is referred to as “suicide”.
There is a love story unfolding so there is a bit of focus on that type of content (falling for someone). It is emotional, but completely clean.
At one point the main character kills a guard. It is shown as wrong.
A past war where humans fought AI is referenced. The thought of this may spook some sensitive readers, especially with all of the AI focus today.