I just implemented SOA for a project with SOAP over SSL using apache axis. Is there a book I can use which will teach me the boundaries of SOAP ? Illustrations of sending SOAP messages with modes like RPC, Message, with and without attachments etc etc would be great. I searched amazon but I am still not convinced about which one to buy. Can you please suggest books that helped you along the way ? So far I have been relying heavily on the AXIS documentation ( pretty good ) and an article or two.