This was a good mystery, even if the themes were overdone. For children, it’s probably one of the first time they are encountering the Templars, so it’s probably not too bad for them. I think the codes would have been better to see in a physical copy than heard in the audiobook, but that’s just the way it is. I am enjoying the series, but get that this one didn’t have as much historical context and the other books I’ve read so far. Maybe the next one will.