This was an engaging, interesting Christian Young Adult read.
I would recommend this book to a YA reader, so long as I knew they were solid in their faith--simply because, with the historical setting, there was some discussion of faulty theology about the Bible, demons, etc. It was fairly promptly dealt with, and I liked how it was handled.
Theology aside, other potentially disturbing content would be a mentally unstable character. This character is also mentioned as being pregnant by a man other than her husband later in the book. There is mention of characters drinking alcohol. I think someone says "curse you" at some point. At the end, there is a description of the father's assassination that includes some blood. These issues could be disturbing for younger/more sensitive readers. However, the strong faith message, as well as the true historical setting that is the story, make where I think it could still be a worthwhile read for a more mature reader.