Marriage or Relationship

Love & Respect - Emerson Eggerichs

The Five Love Languages, Revised - Gary Chapman

As For Me and My House - Walter Wangerin

The DNA of Relationships - Gary Smalley

Couple Devotional Books

Songs in the Key of Solomon - John and Anita Renfroe

Night Light - James Dobson

Pastor recommends http://www.bestbookbuys.com as a great site for low cost resources.