Tim Challies' review: "Piercing in its description of sin and unrelenting in pursuing sin to the deepest recesses of our hearts (and thus, of our relationships), When Sinners Say "I Do" is a most welcome contribution in a busy marketplace. I would unhesitatingly recommend this book to any couple and, indeed, to any single person as well. It is one of the best books on marriage and relationships that I have had the privilege of reading. We all need to see our sinner as bitter so that grace can be sweet. This book's biblical focus will bring both sin and the Savior into clear focus, helping us to build strong relationships centered upon Christ for His glory." You can buy the book here.
Update: Here's an interview with the author, Dave Harvey.