The styles of the two authors blended together nicely. This was a very well-written book, with the perfect mesh of adventure and romance. The crime novel portion was interesting, although the ending was as predictable as these things usually are. The religious aspects of the novel, while important, definitely took a back seat to the crime aspect of the story, so I think that anyone, Christian or not, would enjoy this book. It is not at all preachy.
I'd recommend this novel for anyone who is interested in a crime novel that isn't too terribly intense, with light romance thrown in for good measure. And I very much hope that this won't be the last collaboration of these two authors.