Ha, this one was pretty neat. An interesting frame, with it all serving as a book review. In some ways that frees up the author to do all kinds of interesting stuff, allowing him to perform self-criticism within the body of the story itself, and all viewed through the filter of a jaded critic. Pretty neat.
And, now I'm caught up on B-Sides. I'm not really sure what sets them apart from regular DC episodes, but I'm not going to complain about bonus episodes.