Daniel Wang, a student in the class points out that the Morgan textbook is available cheaper elsewhere on the web than at amazon.com. He writes:

A good place to buy books online is through http://www.bestbookbuys.com

The Robert Morgan book is apparently available for $42.95 + $3.50 for
shipping.

http://www.bestbookbuys.com/cgi-bin/bbb.cgi?ISBN=155558179X