This is a bestselling book on the developmental stages of a marriage and how to keep a strong marriage.

Passages of Marriage

Self-Help

Minirth, Frank

Minirth, Mary Alice

Relationships

Thomas Nelson. Inc.

Now that you are married, you as a couple look toward the days ahead with anticipation. But marriage is a blending together of two complex individuals into one family unit, and the adjustments you make at this time help to build a crucial foundation for a successful marriage. New Love helps couples learn how to: balance unity with individuality and create an intimate relationship, overcome the tendency to jockey for control, build a meaningful sexual union, make the best choices for the marriage and each other.

New Love (Minirth-Meier Clinic Series : Passages of Marriage)

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Renewing Love (Minirth-Meier Clinic Series : Passages of Marriage)

Parenting & Relationships

Transcendent Love helps you learn how to fully enjoy these rewarding years and plan a mutually satisfying retirement; renew love and sexuality as you create a deeper spiritual union; accept the past and maintain a positive attitude toward today; and discover the eternal valuates that link this life with the next. 
Designed to help you successfully meet the challenges of the particular season your marriage is going through, the Passsages of Marriage Series provides insightful and practical guidance into the joys and potential hazards of each passage of marriage.

Transcendent Love (Minirth-Meier Clinic Series : Passages of Marriage)

Family Relationships

Examines the five passages of marriage that couples must complete to build a relationship to its full potential

Passages of Marriage: Five Growth Stages That Will Take Your Marriage to Greater Intimacy and Fulfillment

Newman, Deborah

Newman, Brian