As you probably can tell, I spent some time at the 9Marks site this morning. Lots of great articles, reviews and excellent biblical discernment. A number of folks have asked me about recommended books for marriage. My personal favorites are "When Sinner's Say 'I Do'" by Dave Harvey, "Sex, Romance and the Glory of God" by CJ Mahaney and "Love that Lasts" by Gary and Betsy Ricucci. I also think every husband needs a kick in the pants type book. "Reforming Marriage" by Douglas Wilson helped me that way.
Check out the comparison chart to learn the strengths and weaknesses of select marriage books.
Check out the full 9Marks article with reviews here.