All marriage relationships face hurts and conflicts on several levels, but not many of us know how to deal with them effectively―so we don't. Healing the Hurt in Your Marriage walks couples through a very manageable step-by-step process of understanding different styles of conflict resolution and then encourages them toward forgiveness and healing.
Written from a Christian perspective, this one is a good introduction to the basics of dealing with conflict in marriage. It is very straightforward and gives many helpful examples from minor conflicts to the extreme. I'd recommend it.