Note that the RMH book -while generally praised- is a bit outdated. E.g., it covers the JAX-RPC API, which is deprecated. So you might also want to look at materials covering the successor to JAX-RPC, which is called JAX-WS. This is a books that does.
Evolution of practices, toolkits, WS-* standards, etc. continues to render books obsolete in a year or so. Wikipedia tends to keep up a little better and there is a vast array of blogs, articles, white papers, etc. - all rather hard to keep up with.
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