It's a "best of" collection of Curtis Chen's 512-words-or-fewer flash fiction. Short storylets, one or two scenes apiece; that's about enough space for some wry witty banter and/or to start noodling around some speculative gimmick. I'd already read these as blog posts; so the "reveals" weren't surprises anymore; but I was pleasantly surprised at how well the jokes held up the second time around.