The following books represent some of the top recommendations for a distinctively Christian approach to relationships.

Relationships: Life Together

• It Takes a Church to Raise a Christian: How the Community of God Transforms Lives by Tod Bolsinger 
• Life Together by Dietrich Bonhoeffer
• Making Room for Life: Trading Chaotic Lifestyles for Connected Relationships by Randy Frazee
• Boundaries by Henry Cloud & John Townsend
• The Peacemaker by Ken Sande
• Same Kind of Different as Me by Moore

Relationships: Men, Women & Marriage

• God, Marriage, and Family: Rebuilding the Biblical Foundation by Andreas Kostenberger
• Recovering Biblical Manhood and Womanhood by John Piper & Wayne Grudem (Editors)
• Did I Kiss Marriage Goodbye? by Carolyn McCulley
• The Rich Single Life by Andrew Farmer
• Love, Sex, and Lasting Relationships by Chip Ingram
• The Five Love Languages by Gary Chapman
• This Momentary Marriage by Piper
• The Seven Principles for Making Marriage Work by John Gottman & Nan Silver
• For Women Only by Shaunti Feldhahn
• For Men Only by Shaunti Feldhahn and Jeff Feldhahn
• Sacred Marriage by Gary L. Thomas
• Sacred Sex by Tim Gardner

Relationships: Parenting

• 1001 Ways to Introduce Your Child to the Bible by Kathie Reimer
• Little Visits for Families (Family Devotional) by Allan Hart Johnson & Martin P Simon
• Parenting with Kingdom Purpose by Richard Ross and Ken Hemphill 
• Effective Parenting in a Defective World by Chip Ingram
• 801 Questions Kids Ask About God (a Focus on the Family resource)
• I Believe in Jesus by John MacArthur
• I'm a Christian Now! by Capps & Shaw

Relationships: Leadership

• Spiritual Leadership by J. Oswald Sanders
• Spiritual Leadership by Henry Blackaby
• Teaching to Change Lives by Howard Hendricks
• In the Name of Jesus by Henri Nouwen
• The 21 Irrefutable Laws of Leadership by John Maxwell
• The Next Generation Leader by Andy Stanley
• Courageous Leadership by Bill Hybels