"Grandma Margie's Tale: One Nation Under God" is a children's book written by Dr. K.T. Zulkowski, which tells the story of two grandchildren, Zipporah and Zion, learning about God's people and their connection to protecting America. As Grandma Margie reads to them, they discover the importance of seeking God's guidance and finding strength and courage in His love. The book emphasizes the value of faith, prayer, and the role of brave warriors in protecting their land.