One of the most important thing any disciple of Jesus can do is to understand the story of Salvation History. Tim Gray and Jeff Cavins make that story accessible like never before in this book based on their great project The Great Adventure Bible Timeline Bible study. If you've never taken The Great Adventure, this book is a great introduction to it. If you have gone through the Bible study, this book is a great refresher and supplement. I can't recommend this book strongly enough!