I highly recommend any material by Jimmy Evans. He is the head of a ministry called Marriage Today that puts out books and resources and even hosts a TV show. We have been to several of his conferences and seminars and have always walked away with new knowledge and motivation. He also has a CD series entitled Every Great Marriage that is wonderful. Marriage on the Rock is the first book of his we read as a couple and that was during our pre-marriage counseling almost 10 year ago. We have also used his book Mountaintop of Marriage for the vision retreats my hubby and I take to cast vision and planning for the upcoming year for our marriage, family, finances, and goals.
He is the senior elder at our church, Trinity Fellowship, so we hear him speak on an almost weekly basis. He is one of the best teachers we've ever heard (on marriage and many other topics), and I'm not just saying that because he's my pastor. When we were attending a different church, we would sneak away on Saturday nights to attend Trinity just to hear Pastor Jimmy preach. We are now privileged to call Trinity our church home, and my husband is on staff there. I highly recommend any and all of his materials!
Hope you find something that works!