The publisher of this book has done a absolute awful job or organizing the material. If your professor assigns you this reading as your primary text for Civil Procedure may god have mercy on your soul.
I have two recommendation both in the form of supplements
The first which is designed to follow this casebook. "Learning Civil Procedure" by: David Dithfurth
The Second, a more general but just as valuable. "Examples and Explanations" by: Aspen Publishing, make sure to get the latest edition.
Good Luck in Law School!