I'll fully admit that I picked up this book based on the nifty pop art cover, and then after flipping through it and seeing somewhat unusual typography and story structure, I took it home. The title story leads things off and is a very engaging Jonathan Lethem-style tale about "Moisture Man." He's a cut-rate superhero whose power is, as he puts it, very handy in a water-balloon fight, but that's about all. Already past his prime, to "make it", Moisture Man has to be able to fly, and there's only one way for him to do that: the dark side. It's an amusing framework for examining the compromises we all have to make in our daily lives, and easily the most enjoyable story in the book.
The other ten stories are rather precise, almost cold exercises in the craft of short story writing. While some take on imaginative frameworks, such as "Problems for Self-Study", which unfurls as a quasi-math/logic test, or the series of rules in "Two-Player Infinitely Iterated Simultaneous Semi-Cooperative Game with Spite and Reputation", they don't deviate from the central theme of identity and the quest for a meaningful existence that runs throughout the stories. In one story a couple tries to derive meaning and identity via packaged consumer goods and services, in another a man's identity literally splits in two, in another, an actor becomes overly immersed in his role, and so forth. In many of the stories, the characters aren't even given names, just "man" or "woman" or "A" or "B"... Another running theme is the idea of connection (in the E.M. Forester sense), in that many of the characters want to connect with others (family, lovers, friends), but are unable to move themselves to action. Personally, these failed to strike any kind of chord, and the navel-gazing aspect grew somewhat repetitive. Still, fans of the short form should check this out, as Yu's approach is certainly different from most of what's out there.