Thanks to the nice folks over on java-tips.org for putting up a new book review of "PMD Applied"!
It seems like a pretty nice review. I especially appreciate the way the reviewer noted that Appendix A is an important part of the book. In Appendix A I spent a lot of time going through each of the rules and pointing out strengths and weaknesses of each... including lots of details on writing and optimizing XPath queries. There are also a lot of notes in there on cases that each rule could miss, so if anyone wants an easy way to contribute small fixes to PMD, skimming through that appendix would be a good way to get started.
At any rate, here's where to order your copy. Enjoy!