When Sinners Say I Do is the name of a new book by Dave Harvey, pastor of Covenant Fellowship Church. This is by far one of the best books on marriage that I have read, and will likely bear great fruit. This last year, due to a number of circumstances, God has had me searching into the Word as well as books like this one to challenge me to do those things that will make my marriage more Christ-like.
My friend, Tim Challies, has an excellent review of the book here:
http://www.discerningreader.com/review/when-sinners-say-i-do/