Nathan and Kelli are the creators of "The Couple Project." After being married for over 20 years, they decided to actively work on improving their marriage in 2019. They began studying topics related to relationships and sharing their insights through writing. Their project focuses on learning and sharing what works for them in strengthening their marriage, with the hope that others will find value in their journey. They are the authors of "A United Marriage: 5 Biblical Principles to Ponder."