Koinonia is a New Testament word which is most often translated to mean "communication", "fellowship", or "communion". Koinonia House, or K-House as they are affectionately called, is dedicated to the development and distribution of materials for encouraging and facilitating serious study of the Bible as the inerrant Word of God. They are a non-profit, 501(c)3 organization.

K-House was founded by Chuck and Nancy Missler. Chuck, a Naval academy graduate and former Branch Chief of the Dept. of Guided Missiles, had a remarkable 30-year executive career. He served on the Board of Directors of 12 public companies and was CEO of 6 of them. For twenty years Chuck balanced his high-profile corporate career with his teaching committment to a weekly Bible study at Calvary Chapel Costa Mesa in Southern California. Nancy, while raising their four children, has touched the lives of thousands through her in-depth teaching of Biblical discoveries in her "Way of Agape" and "Be Ye Transformed" books and tape series.