We encouraged our couples to choose a book that would help them grow in their marriage this summer. Here is a list with some ideas. The books in bold are ones that I highly recommend.
Overall marriage/theology of marriage
This Momentary Marriage by John Piper
The Intimate Marriage by R. C. Sproul
Reforming Marriage by Douglas Wilson
The 10 Commandments of Marriage by Ed Young
Fit to Be Tied by Bill and Lynne Hybels
A Marriage Without Regrets by Kay Arthur
Needs of men & women
The Five Love Languages by Gary Chapman
Love and Respect by Dr. Emerson Eggerichs
10 Great Dates to Energize your Marriage by David & Claudia Arp
Growing a Spiritually Strong Family by Dennis & Barbara Rainey
The Four Loves by C. S. Lewis
The Love List by Les & Leslie Parrott
Love for a Lifetime by James Dobson
For Men
Sex, Romance, and the Glory of God by C. J. Mahaney
The Silence of Adam by Larry Crabb
Sex
Sex and the Supremacy of Christ edited by John Piper and Justin Taylor
Sex God by Rob Bell
Love Story
A Promise Kept by Robertson Mcquilken