You would typically use cubic units to measure the volume of a book. Here are some common options:

* Cubic centimeters (cm³) or cubic millimeters (mm³): These are smaller units, often used for measuring the volume of smaller objects.

* Cubic inches (in³): This is a common unit for measuring volume in the United States.

* Cubic feet (ft³): This is a larger unit, usually used for measuring the volume of larger objects or spaces.

The best unit to use will depend on the size of the book. For a typical paperback or hardcover book, cubic inches or cubic centimeters would be appropriate.