If you’re interested in learning more about maximizing the quality of your relationship, Alexa recommends the following resources:

The Seven Principles for Making Marriage Work: A Practical Guide from the Country’s Foremost Relationship Expert
by John Gottman, Ph.D. and Nan Silver
(Three Rivers Press)

Lies at the Altar: The Truth About Great
Marriages
by Robin L. Smith
(Hyperion)

Boundaries in Marriage
by Dr. Henry Cloud and Dr. John Townsend
(Zondervan)

For the couple who is experiencing the problems of extramarital affairs Alexa recommends the book:
Getting Past the Affair
by Doug Snyder
(The Guilford Press)
An excellent resource to combine with counseling in helping a couple heal from an affair.