This is a short read, but a good summary of where some green technology product development is now. There are basically 6 chapters:
-grid-scale electricity storage
-other stuff: other technologies, and military applications and development
Shultz and Armstrong are from Stanford and MIT, respectively, so the research that's covered here is pretty Stanford- and MIT-centric. They didn't wander far and wide looking for other research, but that's fine -- there's exciting stuff going on at Stanford and MIT. It's just not comprehensive.
I really liked how the chapters were organized. The main text is a summary of what the technology is used for and what's available now. Then there are break-out boxes for some available-now technologies, but also near-at-hand and on-the-horizon, helping us to look from current research to what may be available commercially in the near future.
All-in-all, a good little read and informative. Just don't expect it to be comprehensive. At 100 pages or so, it's couldn't possibly be. Most people will find something in it that's somewhat unexpected and novel, though.