4/5 Useful..
  by Klaus Jr. (Littleton MA)
It is what it is. This is a book of chord and scale diagrams for playing in DADGAD. It contains chords and scales that you might conceivably want or need to use for the common keys you'd use DADGAD for, clustered according to key. It is very simply and usefully laid out. And it is 40 pages for $7.95.

2/5 DADGAD for the advanced guitarist.
  by Daniel K. Ross (Fairmont, WV)
I really thought Mel Bay would produce a better DADGAD chord book than this. It's hard to understand and I think there are very few usable chords shown in this book. The book talks about progression and scales etc etc and the illustrations are very complicated. For a beginner, do NOT buy this book. If you have studied music and understand chord progression etc and are an advanced guitarist, by all means give this book a try. But for me, it's two thumbs down. I've learned more off YouTube watching them play than what I've gotten from this book.