I read part of this book. It's a good resource for the topic (and I took a course or 2 with Steven J. Miller during my MLIS). But I'm adrift in my career and I didn't want to devote any more time to this book unless I know what direction I'm headed.

Overall a decent overview. The DC, MODS, and VRA element specs you can find online. The chapter on metadata sharing as well as the chapter on designing and documenting a scheme were very helpful. ( )