Here are some resources for further reading on The Gospel & Marriage.
1. The Gospel and Marriage (Deepak Reju, the biblical counseling coalition)
2. Cultivating a Gospel Centered Marriage (Dave Bruskas)
3. A Missional Marriage (Geoff Kirkland)
4. The Mutual Duties of Husbands and Wives Toward Each Other (Richard Baxter)
5. Should We Get Married? (William Smith, CCEF)
6. The Mystery of Marriage (James Hamilton)
7. This Momentary Marriage (John Piper)