Had an interesting few days getting the Docbkx Maven plugin from Wilfred Springer to render the Maven book. It works well. I started out passing customization options to the plugin, but, in the end I decided to do most of my customizations using the htmlCustomization and foCustomization properties.
Another note is that version 2.0.8 of the plugin uses Apache FOP 0.94 which was throwing a troublesome “missing entity” error. I ended up stepping down to version 2.0.7 and my problems vanished. I’ll try to post a link to the project (and the final rendered output) later.