Programming Web Services with SOAP
http://www.oreilly.com/catalog/progwebsoap/chapter/ch03.html

Snell, James, Doug Tidwell and Pavel Kulchenko
O'Reilly and Associates
2001

Abstract:

The task of creating and deploying web services is really not all that difficult, nor is it all that different than what developers currently do in more traditional web applications. The tendency on all platforms is to automate more and more of the gory details and tedious work in creating web services. Most programmers don't need to know the exact details of encodings and envelopes; instead, they'll simply use a SOAP toolkit such as those described here.