Craig Groeschel's book "Love, Sex and Happily Ever After" is a funny, touching and instructive book filled with testimonies and practical teaching.
I have read many books on marriage and relationships and while Groeschel's book doesn't seem to bring anything brand new to the table, and he doesn't need to. His gift is that he's bringing the same truths in with his relevant language, humor and winsomeness.
For example, I don't know of any other pastor who has included an illustration of Napoleon Dynamite's quirky brother KIP and his love for LA FAWNDA. But Groeschel pulls it off and readers who get the joke LAUGH oUT LOUD!
Perhaps the best points he presents are about Friendship within marriage. In his chapter "THE FRIENDSHIP FOUNDATION" he writes: "Take things at God's pace. If at any time you know that the person you're with isn't God's best, do the right and wise thing, and gently end the relationship. If, on the other hand, you know that God is blessing your friendship toward marriage, then shift gears, following His pace and path, and enjoy the relational ride of your life." (pp. 51-52)