I bought this book looking for anecdotes of some amazing ways God answered prayer in George Muller's life, especially ones that could be used as illustrations for teaching, sermons, etc... What I didn't expect was God to work in my heart so much while reading it. The book certainly contains many amazing accounts of how God provided for George Muller and his ministry, but more than anything the book is a powerful narrative of how God responds to faith and prayer. Muller's life goal was to show that God is a living God who hears and answers prayer, and God richly blessed this life of faith.
The refreshing thing about this biography is that you learn just as much about the almighty God whom Muller served as you do about Muller himself. The author also often steps out of the narrative to help the reader to apply lessons from Muller's life. However, these asides never feel forced or interrupt the flow of the narrative, they only add to the reader's enjoyment and edification. I'm certain that the writing of this book itself was bathed in prayer, and it will show in the heart of the reader.
As mentioned before in other reviews, the language is a bit formal, as was common style in the late 1800's, but it's still very accessible, even to High School students. I heartily recommend this book!