The book The Power of the Word, A History of the Seventh-day Adventism in Central Kenya, published by Grandmaster Empire in 2021, is authored by Pastor Dr. Frederick Kimani Wangai. According to the back cover of the book, Wangai was ordained a pastor of the Seventh-day Adventist (SDA) church in 1960. He served as an evangelist, a church pastor, and an administrator in various positions until his retirement in 2002. After retirement, he took up a new challenge that culminated in a PhD in Christian Counseling. He now operates a counseling practice. He is often called upon to perform ecclesial activities such as baptisms, weddings, and funerals and he also regularly participates in evangelism and preaching of the Word.
Mary Getui (Sat,) studied this question.