JBoss has, of course, hundreds of MBeans in the JMX container, when it's up and running. How many of these mbeans are examined in the book? One of things that I found confusing (more frustrating) about JBoss, is that I couldn't find decent documentation on what many of the mbeans are (this was years ago, so may have changed).
Does the book go into some detail? Maybe examine some that may be useful? Obviously, examining all is not possible, in a general JBoss book.... And .... has the JBoss online docs improved in this regard?