Web Services Resources

Web Services Essentials. Ethan Cerami, O'Reilly, 2002. ISBN 0-596-00224-6. Covers the various XML languages essential to web services: XML-RPC, SOAP, WSDL, UDDI.
Programming Web Services with XML-RPC. Simon St. Laurent et al, O'Reilly, 2001. ISBN 0-596-00119-3. Focuses on the XML-RPC language that allows remote procedure calls to be transmitted across HTTP.
SOAP: Cross Platform Web Service Development Using XML. Scott Seely, Prentice Hall PTR, August 2001. ISBN 0-13-090763-4. A "cookbook" for using SOAP to develop web services. Includes a start-to-finish SOAP case study application-from requirements and design through coding.