The four pages on the inside front and back covers and the facing flyleaf pages contain a Quick Reference Guide to the methods and concepts covered in the text. It is another tool for getting a view of the forest through all of the trees. Although this quick summary suffers from omission and simplification, as does any such condensation, students can challenge themselves to explain each of these ideas listed there, to construct examples using each of the methods, and to explain connections among the various entries.