This book is an apologetic for Ellen White being a true prophet of God. The author, an associate secretary for the Ellen G. White Estate, explains what a prophet does, how Ellen White was chosen, gives several direct examples from the life of Ellen White showing that she must have been inspired from God, and ends with several examples of non-SDAs who admitted that Ellen White had more than human inspiration to arrive at some of her writings.
It is interesting, and probably well-suited for someone who desires to learn about Ellen White to know if they can believe what she wrote is from God or not. With humble, self-denying leaders, the movement will be strong in the truth and God can work mightily for it. But when the leaders are self-serving and indulgent, you can expect the members to display similar traits.