I became a Christian while attending a Christian college (Huntington, IN). I have been attending a Wesleyan Church for most of the past 20 years. I read the book and enjoyed it very much. It is NOT a book for Christians to give to Non-Christians. But for Christians it is very thought provoking.
There was a book written years ago. I think the name was “Joshua”. For whatever reason, I don’t remember why but I think I burnt it. I didn’t want my kids reading it. Does anyone remember the book?
I would not be careful in suggesting certain books to some people for lack of spiritual maturity.