While this is not a book, it is a great story about how creation calls for a designer. If you haven't seen it you should definitely watch it, and if you have seen it, watch it again.
We have used this cartoon in vacation Bible school, high school classes and even in our adult Bible class (when studying Christian evidences). Also, check out Apologetics Press material for class books, study articles and more.
What other tools have you used to teach Christian evidences?