Meaty Bible study for teens, young adults and new/young believers. This book is not devotional in nature. The concepts it deals with are meaty. But it is written in a way that even children can understand. There’s no reason not to learn doctrine when there are truth-filled, helpful books such as this. Letters to Brian & Daniel will clearly impart wisdom on the nature of God, the nature of man, the sovereignty of God, salvation, grace, faith, law and freedom.