If you liked the book (or movie), Fireproof, you may like the The Missing Piece, although it's more intense.
One reviewer states, "The interaction between Dylan and Lorraine evoked feelings similar to Kirk Cameron's Fireproof, but this is more involved and more developed than that healing romance. The author beautifully shows how worldly love, loss, regret, substance abuse and physical pain are necessary for change and can be redeemed for God's glory. Fresh, vibrant, polished prose is used throughout which makes every chapter a joy to read." http://www.amazon.com/dp/B006SP46GU