How many books are in the Complete Calvin and Hobbes set?

The Complete Calvin and Hobbes, which is a three-volume boxed set containing every C&H strip ever published, is available at Amazon.com (Amazon.com/Complete-Calvin-Hobbes-v/dp/0740748475">http://www.Amazon.com/Complete-Calvin-Hobbes-v/dp/0740748475) for $94.50, as of 12/10/09. The list price (as of 12/10/09) is $150.00.