They All Laughed at Christopher Columbus: An Incurable Dreamer Builds the First Civilian Spaceship

The 5 Love Languages: The Secret to Love that Lasts, Edition 4

Running on Empty: Overcome Your Childhood Emotional Neglect

The Girl Who Smiled Beads

8 Rules of Love: How to Find It, Keep It, and Let It Go

Age Is Just a Number: Achieve Your Dreams at Any Stage in Your Life

Hold Me Tight: Your Guide to the Most Successful Approach to Building Loving Relationships

The Seven Principles For Making Marriage Work

The 5 Love Languages/The 5 Love Languages for Men Set

Boundaries in Marriage: Understanding the Choices That Make or Break Loving Relationships

The Meaning of Marriage: Facing the Complexities of Commitment with the Wisdom of God

The Value of Others: Understanding the Economic Model of Relationships to Get (and Keep) More of What You Want in the Sexual Marketplace

The Journal of Best Practices: A Memoir of Marriage, Asperger Syndrome, and One Man's Quest to Be a Better Husband

The Invisible Partners: How the Male and Female in Each of Us Affects Our Relationships

What Are the 5 Love Languages?: The Official Book Summary

The Diary of a CEO: The 33 Laws of Business and Life

The 4 Seasons of Marriage: Secrets to a Lasting Marriage

Love and Respect: The Love She Most Desires; The Respect He Desperately Needs

How Not to Hate Your Husband After Kids

Mars And Venus In The Bedroom: A Guide to Lasting Romance and Passion