In The Space Between Words the parallel between survival and PTSD was handled well. One story pushed the other along.
First person POV is hard to master. The author dug deep when needed and pulled back when she needed to show an emotional detachment. Each of the characters were well developed and easy to identify with in the story. I especially was fond of the Huguenot storyline. That was extremely intriguing. Learning in detail about the history of the Protestants suffered under Catholicism brought to life a piece of history most would never have known.
I wouldn't consider this a Christian novel. The character, Patrick, would have been better handled as a figment of her broken mind and not as a "person" that Connor could see. That fell into secular mysticism.
The only Christian faith that the book dealt with was with the Huguenot storyline and with Mona. Other than that, the Christian faith wasn't in the book. There wasn't even a conclusion with Grant and Jessica's faith--did they or did they not gain salvation? They were barely receptible to Mona's belief in God.
Some of the phrases I came across were crude and/or considered taking the Lord/God's name in vain. So Christian reader beware.
The book was engrossing, emotional, and heart-wrenching with that touch of hope that is needed to bring a good ending to a story.