The Haskell School of Expression may be ordered directly from the publisher via the folllowing contacts:

Cambridge University Press:   http://www.cup.org

Direct URL to book listing:    http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521644089.

Examination copies may be requested via:  http://www.cambridge.org/us/textbooks/inspection_copy.asp

The book may also be ordered from Amazon.Com (www.amazon.com), Barnes and Noble (www.bn.com), and other (fine, upstanding) on-line bookstores.