Would you consider Every Breath by Nicholas Sparks  Christian Fiction?   I found some of his books on Christianbooks.com but not this one.

I found this excerpt in one of the reviews on Amazon.  I've also included some information from Thrift books Having not read any of his books I would have to opine that he is not a "Christian author" as we might call that, but he does have Christian leanings.

"BLUSH FACTOR: This love story is absent any profanities, but the love scenes, while drawing a clear, unmistakable picture, are not graphic in the sense of more risqué novels. Tantalizing? Yes, but not over-the-top graphic. Read first before deciding to read to anybody else, is the best advice I can give. Wonderful images beautifully written is another way to put it.."  Amazon review

"His work is predominantly romance novels, often with tragic elements and Christian themes." Thriftbooks review