I recently had the change to review the second edition of the Apache Axis2 book from Deepal Jayasinghe and Afkham Azeez. I think it gives a nice overview of the various web services aspects and how to develop applications with Apache Axis2. On the one hand it can be used as a reference for the various web services standards and Java APIs in this area, on the other hand it also covers important topics like clustering and enterprise integration patterns. It comes with samples which show how to use Axis2. In general its a nice book which you consider when using Axis2. Some examples or descriptions could be a little bit more detailed though.
There is still the Packt Graphic Apps and Libs Campaign.