He definitely didn't have the book ghostwritten. It does have advice on issues that go beyond faith. But I think it's much more useful as a guide to the faithful than the non-faithful. We interviewed him last year about the book:

https://pnc.st/s/business-books/9720205c/the-juggling-act-wi...

He gets into many of the issues discussed in this thread: having faith while being a CEO and how to handle that.