This book is written for a preteen to early teen audience and introduces children to an important person in church history by the name of John Knox. There is a lot of history, historical pictures, and theology in this book which makes it a wonderful educational tool as well. With so much religious freedom in our country today, it may be hard to comprehend that for John Knox standing up for truth was not the easiest or safest choice. Indeed, for a period of 19 months John Knox was sentenced to hard labor on a ship used for war. John Knox grew up in Scotland and was a reformer whose passion still influences our thinking today. He was in the audience of kings and queens of the day. There is a lot of action in this book to keep its readers engaged. Once started, this book is a hard book to put down until read from cover to cover.