We Shall Be as One is the fourth and final book in The Trees of Mamre series. Our heroine, Emily McKee, and her husband, James, live a peaceful life on his familys farm in Central, Indiana, and travel to the growing town of Jeffersonville, Indiana, on the Ohio River. They temporarily share a rented mansion with her aunt Lucinda. Emilys wealthy father wants James to investigate possibilities of starting a riverboat building company and find land to raise horses. They cross paths with friends from their past who help them accomplish their goals as well as fulfill many of their lives dreams. The Trees of Mamre series embodies the pioneer spirit, love, and hardships endured by our ancestors while settling this wild land.