This is a really helpful book as an introduction to some key characters in Church history. For both clergy, but especially layman, this is a great way to gain some familiarity with how the Spirit of God has raised up godly men to help preserve the Church and the Gospel, throughout history. I did find it curious that he included a woman, Perpetua, as a Church father. Though her story of martyrdom is certainly inspiring, it seemed a bit out of place given the overall focus of the book. Regardless, this is a worthwhile book as an introductory overview of early Church Fathers.