I ended up skimming the second half of the book, because it's just a little too dry to keep my attention. I thought that this book was geared to teens, but I think it's actually meant more for an adult to use as a resource in teaching teens. There are a few leaps in logic that an adult could intuitively grasp, but a teen might need more explicit explanation. Overall there is a lot of value in this book, but it's not the most exciting to read.